Hardgrave Grindability Index Interim Report (2136) Feb 1964

This material is held atWest Glamorgan Archive Service

Reference
- GB 216 D/D PRO/NCB/6/161
Dates of Creation
- Feb 1964
Language of Material
- English
Physical Description
- 1 file

Archive Record|Table of contents

National Coal Board Scientific ReportsD/D PRO/NCB6

Analyses of six pillar samples taken at the collieries of Messrs Evans and Bevan, samples 79, 79/BL, 80, 80/C, 80/P, 81. Summary. n.d.D/D PRO/NCB/6/1

Onllwyn No. 3 Colliery. Samples 81, Nine Feet Seam. Oct. 1938D/D PRO/NCB/6/2

Seven Sisters Colliery. Samples 80/P, Peacock or Brass. Oct. 1938D/D PRO/NCB/6/3

Seven Sisters Colliery. Samples 80/C, the Cornish Seam. Oct. 1938D/D PRO/NCB/6/4

Seven Sisters Colliery. Samples 80, Nine Feet Seam. Oct. 1938D/D PRO/NCB/6/5

Onllwyn Colliery. Samples 79/BL, Bluers Seam. Oct. 1938D/D PRO/NCB/6/6

Onllwyn Colliery. Samples 79, Nine Feet Seam. Oct. 1938D/D PRO/NCB/6/7

No. 1 Area South Western Division. Sample taken at New Gellihir Colliery (Penlan). 8 Dec.1947D/D PRO/NCB/6/8

South Western Division, No. 1A Area. Onllwyn No. 3 Colliery. Trigloin or Bluers Seam. Jul. 1948D/D PRO/NCB/6/9

South Western Division. No. 1A Area. Rhos Colliery (Onllwyn No. 2.). Brass vein (so named). Jul. 1948D/D PRO/NCB/6/10

South Western Division. No. 1A Area. Onllwyn No. 3 Colliery. Rhyd seam. 29 Jul. 1948D/D PRO/NCB/6/11

South Western Division. No. 1A Area. The correlation of the so-called Brass vein of Rhos Colliery, Onllwyn. Aug. 1948D/D PRO/NCB/6/12

South Western Division. No. 9 Area. Brynhenllys Colliery. Trigloin Seam. Aug. 1948D/D PRO/NCB/6/13

South Western Division. No. 9 Area. Brynhenllys Colliery. Middle Vein. Aug 1948D/D PRO/NCB/6/14

Yniscedwyn Colliery. Upper Black Vein. Feb. 1949D/D PRO/NCB/6/15

The seams in the Gwendraeth valley. Mar. 1949D/D PRO/NCB/6/16

Ammanford Colliery. Lower Pumpquart Seam. Jan. 1950D/D PRO/NCB/6/17

Wernos Open-cast Coal Sites. Stanllyd and Middle Pumpquart Seams. 25 Apr. 1950D/D PRO/NCB/6/18

Saron Colliery. Middle Pumpquart Seam. 9 Apr. 1951D/D PRO/NCB/6/19

Saron Colliery Charcoal Seam 9 Apr 1951D/D PRO/NCB/6/19a

Varteg Colliery. Welsh Vein. 3 Aug. 1951D/D PRO/NCB/6/20

Varteg Colliery. Un-named Seam and Red Vein. 3 Aug. 1951D/D PRO/NCB/6/21

Llandebie Colliery. Lower Triquart Seam. 22 Oct. 1951D/D PRO/NCB/6/22

Brynhenllys Colliery. Brynlloi Seam. 28 Dec. 1951D/D PRO/NCB/6/23

Wernos Colliery. Rock Seam. 22 Jan. 1953D/D PRO/NCB/6/24

Wernos Colliery. Upper Pumpquart Seam. 22 Jan. 1953D/D PRO/NCB/6/25

No. 1 Area, Blaenhirwaun Gras Vein Nov 1959D/D PRO/NCB/6/26

No. 1 Area, Blaenhirwaun Colliery Stanlydd Vein Nov 1959D/D PRO/NCB/6/27

No. 1 Area, Blaenhirwaun Colliery Green Vein Nov 1959D/D PRO/NCB/6/28

No. 1 Area, Cynheidre Colliery Gwendraeth Seam. Interim Report Oct 1959D/D PRO/NCB/6/29

Area No. 9. The Upper Pumpquart Seam at Wernos Colliery Jul 1959D/D PRO/NCB/6/30

No. 1 Area, Cynheidre Colliery Nos 1, 2 and 3 underground boreholes Aug 1959D/D PRO/NCB/6/31

No. 9 Area, Abernant Colliery Analyses of Seams in Shafts Aug 1959D/D PRO/NCB/6/32

Examination of three opencast-mined seams for comparison with deep-mined seams. Opencast sites: a. Waunlwyd, b. Bryngwyn, c. Talywaun. Seams: a. Big Vein, b. Nine Feet, c. Lower Big (Threequarter) Jun 1959D/D PRO/NCB/6/33

No. 1 Area, The Gras Vein at Pentremawr Colliery May 1959D/D PRO/NCB/6/34

Area No. 1, XXXII. The Green Vein at New Cross Hands Colliery Feb 1959D/D PRO/NCB/6/35

No. 1 Area, Pentremawr Colliery No. 2 borehole Mar 1959D/D PRO/NCB/6/36

No.1 Area Morlais Colliery XXXIX. The Swansea Four Feet Seam Jan. 1959D/D PRO/NCB/6/37

Area No. 9 Wernos underground borehole Feb 1959D/D PRO/NCB/6/38

No. 1 Area Blaenhirwaun Colliery XXXVII. The Lower Pumpquart Seam Nov 1958D/D PRO/NCB/6/39

No. 1 Area Cross Hands No. 1 Borehole Jul 1958D/D PRO/NCB/6/40

No. 9 Area XVII. The Cornish Seam at Aberpergwm Colliery Jun 1958D/D PRO/NCB/6/41

No. 1 Area. Garngoch Collieries Nos. 1 and 3, Boreholes 1 to 5 May 1958D/D PRO/NCB/6/42

No.1 Area. Pentremawr Colliery - No. 1 Borehole Apr 1958D/D PRO/NCB/6/43

Abernant Colliery Interim Report. Seams to 2282ft N. Shaft, seams to 2487ft S. Shaft Mar 1958D/D PRO/NCB/6/44a-b

No. 9 Area. Abercrave Colliery Seam Analysis Oct 1951D/D PRO/NCB/6/45

Pontyberem Colliery: No. I Area: the Lower Pumpquart Seam Sep 1951D/D PRO/NCB/6/46

Rock Colliery. No. 9 Area Rhyd and Grey Seams. Annotated on the cover See our Report 9/53/A Apr 1951D/D PRO/NCB/6/47

The Cenrhos Seam and adjacent seams Llanelly - Burry Port District No 1 Area. Feb 1951D/D PRO/NCB/6/48

No 1 Area New Cross Hands Colliery Charcoal Seam Dec 1950D/D PRO/NCB/6/49

No 1 Area Blaenhirwaun Colliery Lower Pumpquart Seam Feb 1951D/D PRO/NCB/6/50

Cefn Coed Colliery. No. 9 Area Eighteen Feet Seam Feb 1951D/D PRO/NCB/6/51

Pwllbach Colliery Red Vein, with hand-written annotation No. 9 Area Dec 1952D/D PRO/NCB/6/52

Anthracite:- Carbon and Hydrogen Analyses for Classification Apr 1950D/D PRO/NCB/6/53

Garngoch No. I Colliery Area I. Swansea Five Feet, Six Feet and Three Feet Mar 1950D/D PRO/NCB/6/54

No. 1 Area Correlation of the Swansea Six Feet and Graigola Seams Pontardulais and Gorseinon District. To Accompany Diagrams 1657 and 1658. With annotation on the cover: Graig Merthyr Mar 1950D/D PRO/NCB/6/55

No.1 Area Morlais Colliery Swansea Five Feet Seam (Morlais Four Feet) Feb 1950D/D PRO/NCB/6/56

Mountain Colliery No. 1 Area. The Swansea Six Feet, Swansea Five Feet and Golden or Swansea Three Feet Seams Feb 1950D/D PRO/NCB/6/57

Graig Merthyr Colliery. No 1 Area. The Graigola group of seams. Feb 1950D/D PRO/NCB/6/58

Seam Survey, No. 1 Area. Preliminary report. The Seams at Mountain, Graig Merthyr and Morlais Collieries. Jan 1950D/D PRO/NCB/6/59

No. 1 Area. Morlais Colliery. Swansea Four Feet Seam (Six Feet of Morlais) Interim Report. May 1949D/D PRO/NCB/6/60

Talyclyn Colliery, No. 1 Area. The Fiery or Swansea Six Feet Seam, the Golden or Swansea Three Feet Seam. Feb 1950D/D PRO/NCB/6/61

No. 1 Area. Gwendraeth No. 1 Borehole. Seams encountered to a depth of 2,000 feet. Interim report. Feb 1950D/D PRO/NCB/6/62

The Swansea Six Feet and Swansea Five Feet Seams at Garngoch No. 3 Colliery Annotated on the cover No. 1 Area Jan 1950D/D PRO/NCB/6/63

No. 1 Area Trimsaran Colliery The Waunffrynnonau, Drap, Mole, Graigog and Yard Seams Nov 1953D/D PRO/NCB/6/64

No. 1 Area Felinfran No. 1 Borehole. Interim Seam Report. Supposed Hughes Vein at 1281ft.6ins May 1954D/D PRO/NCB/6/65

No.1 Area Great Mountain Colliery. The Stanllyd and Hwch Seams Nov. 1953D/D PRO/NCB/6/66

Area No. 9. Yniscedwyn Colliery. the Bluers, Little Brass (Rhyd), Middle and Lower Seams Oct 1953D/D PRO/NCB/6/67

No. 1 Area. Gwendraeth (Cynheidre) Boreholes 1 and 2. Report on Seam Analyses. Feb 1954D/D PRO/NCB/6/68

Area No. 1. Hendy Merthyr and Clydach Merthyr collieries. Upper Maesmelyn Seam. Mar 1954D/D PRO/NCB/6/69

Area No. 9. Abergrave Colliery. Lower Vein. Mar 1954D/D PRO/NCB/6/70

No. 9 Area. Onllwyn No. 3 Colliery. a) the Grey Seam, b) the Rhyd Seam. Aug 1953D/D PRO/NCB/6/71

No. 9 Area. Abergrave Colliery. Bluers and Little Brass (Rhyd) Seam. Jun 1953D/D PRO/NCB/6/72

No. 9 Area. Peacock (Three Feet) Seam at Aberpergwm Colliery. Jun 1953D/D PRO/NCB/6/73

No. 9 Area. Preliminary Report on Seam Analyses. Petreclwydau Project, Vale of Neath. Including Dulais Valley Seam Analyses. Mar 1953D/D PRO/NCB/6/74

No. 1 Area. Felinfran Colliery. Graigola Seam. Feb 1953D/D PRO/NCB/6/75

No. 9 Area. Onllwyn No. 1 Colliery. Cornish Four Feet Seam. Jan 1953D/D PRO/NCB/6/76

No. 9 Area. Onllwyn No. 1 Colliery. Bluers Seam. Jan 1953D/D PRO/NCB/6/77

No. 9 Area. Abercrave Colliery. Eighteen Feet Seam. Dec 1952D/D PRO/NCB/6/78

No. 1 Area. Blaenhirwaun Colliery. The Hwch Seam. Dec 1952D/D PRO/NCB/6/79

Area No. 9. Ffaldydre Colliery. No. 1 Rhondda Seam. Oct. 1952D/D PRO/NCB/6/80

Area 9. Cwmgrach Colliery. Bluers Seam. Aug 1952D/D PRO/NCB/6/81

No. 9 Area. Gelliceidrim Colliery. The Middle Vein and Lower Vein. Jul 1952D/D PRO/NCB/6/82

No. 9 Area. Pantyffynnon Colliery. Rock, Upper Pumpquart, Stanllyd, Brynlloi and Lower Pumpquart Seam. Jul 1952D/D PRO/NCB/6/83

No. 9 Area. Abergrave Colliery. Middle Vein. Jun 1952D/D PRO/NCB/6/84

No. 1 Area. Brynlliw Colliery Development Scheme. Interim Report on Seam Analyses. Jun 1952D/D PRO/NCB/6/85

No. 9 Area. Glyncastle Colliery. The Upper Four Feet Seam. Jun 1952D/D PRO/NCB/6/86

No. 1 Area. Gwendraeth no. 2 Borehole. Interim Report on Seam Analyses to Depth of 2170 feet. May 1952D/D PRO/NCB/6/87

No. 9 Area. Brynteg and Dillwyn Collieries. Red Vein. May 1952D/D PRO/NCB/6/88

No. 9 Area. Blaenant and Crynant Collieries. No. 2 Rhondda Seam. May 1952D/D PRO/NCB/6/89

No. 1 Area. Gwendraeth No. 1 (A and B) Boreholes. Seam Analyses. May 1952D/D PRO/NCB/6/90

No. 1 Area. Pontyberem Colliery. The Gwendraeth, Braslyd and Stinking Seams. Apr 1952D/D PRO/NCB/6/91

No. 9 Area. The White Four Feet. Aberpergwm Colliery. Apr 1952D/D PRO/NCB/6/92

No. 9 Area. Onllwyn No. I Colliery. Brass Vein. Apr 1952D/D PRO/NCB/6/93

No. 9 Area. The White Four Feet Seam. Cefn Coed Colliery Apr 1952D/D PRO/NCB/6/94

No. 9 Area. The Strwin Seam at Cefn Coed Colliery. Dec. 1951D/D PRO/NCB/6/95

No. 9 Area. Ystalyfera Colliery. Middle Vein. Oct 1955D/D PRO/NCB/6/96

No. 9 Area. Ynisarwed Colliery. Red Vein. Sep 1955D/D PRO/NCB/6/97

No. 9 Area. Onllwyn No. 1 Colliery. Unknown Seam exposed in roof of Eighteen Feet workings (Interim Report). Sep 1955D/D PRO/NCB/6/98

No. 9 Area. Glyncastle Colliery. Six Feet Seam. Sep 1955D/D PRO/NCB/6/99

No. 9 Area. Cwmllynfell Colliery. Middle Vein. Aug 1955D/D PRO/NCB/6/100

No. 1 Area. Cynheidre Colliery. Seams in No. 1 and No. 2 Shafts. Interim Report on Analyses May 1955D/D PRO/NCB/6/101

No. 1 Area. No. 1 Underground Borehole down from the Swansea Six Feet Seam. Hughes Vein at 899ft.3ins. May 1955D/D PRO/NCB/6/102

No 1 Area. Trimsaran Borehole. Report on Seam Analyses with Geological Report. Mar 1955D/D PRO/NCB/6/103

No. 1 Area. Felinfran No. 1 Borehole. Seam recorded as 1ft.6ins at 3294ft.7ins and thin Coals between 1811ft.6ins and 3228ft. Mar 1955D/D PRO/NCB/6/104

No. 1 Area. Carway Colliery. Ddugaled and Felin Seams. Dec 1954D/D PRO/NCB/6/105

No. 9 Area. Ammanford Colliery. Wigan Seam. Dec 1954D/D PRO/NCB/6/106

No. 1 Area. Interim Seam Report. a) Felinfran No. 1 Borehole Thin Coals to 1485ft, b) Felinfran No. 2 Borehole Supposed Hughes Vein at 1134ft. Sep 1954D/D PRO/NCB/6/107

No. 1 Area. Mountain Colliery. No. 2 Underground Borehole down from the Swansea Six Feet Seam. Four Seams at 49ft.10ins to 968ft8ins. Thin Coals Between 470ft and 630ft. Sep 1954D/D PRO/NCB/6/108

No. 1 Area. New Cross Hands Colliery. Stanllyd Seam. Sep 1954D/D PRO/NCB/6/109

Pneumoconiosis Field Research Programme Cwmgrach Colliery - South Wales Coalfield. Examination of the Coal Seams and Associated Strata. Appendix 1. Dec 1954D/D PRO/NCB/6/110

Pneumoconiosis Field Research Programme Cwmgrach Colliery - South Wales Coalfield. Summary of the examination of the Coal Seams and Associated Strata. Jul 1954D/D PRO/NCB/6/111

Pneumoconiosis Field Research Programme Pentremawr Colliery - South Wales Coalfield. Summary of the Examination of the Coal Seams and Associated Strata. Jul 1954D/D PRO/NCB/6/112

Pneumoconiosis Field Research Programme Pentremawr Colliery -South Wales Coalfield. Examination of the Coal Seams and Associated Strata. Appendix 1. Nov 1954D/D PRO/NCB/6/113

No. 9 Area. Interim Seam Report. Cwmgorse Valley no. 6 Borehole (Barans) (1870) Dec 1957D/D PRO/NCB/6/114

No. 9 Area. Interim Seam Report. Cwmgorse Valley No. 7 Borehole (Egel) (1869) Dec 1957D/D PRO/NCB/6/115

No. 9 Area. A survey of seams at Plough Faces. VIII. Big Vein at Gwaun-cae-Gurwen (East) Colliery (Proposed Plough Face) (1868) Dec 1957D/D PRO/NCB/6/116

No. I Area. Morlais Colliery. Swansea Four Feet and Swansea Five Feet Seams (1842) May 1957D/D PRO/NCB/6/117

No. I Area. Cynheidre Shaft Sinkings - Seam Analyses (1847) Apr 1957D/D PRO/NCB/6/118

No 1 Area. Cynheidre Colliery: seams encountered during development (First interim report) (1855) Aug 1957D/D PRO/NCB/6/118a

No. 1 Area. Seam Analyses: Cynheidre shaft sinkings (Interim report at completion of shaft sinking) (1826) Jan 1957D/D PRO/NCB/6/119

No. 9 Area. Cwmgorse Colliery. Red Vein (1810) Sep 1956D/D PRO/NCB/6/120

No. 1 Area. Garngoch No. 3 Colliery. Swansea Five Feet, Six Feet and Three Feet Seams (1807) Aug 1956D/D PRO/NCB/6/121

No. 9 Area. Pwllbach Colliery. Red Vein (1792) Jun 1956D/D PRO/NCB/6/122

No. 1 Area. Blaenhirwaun Colliery. Stanllyd and Gras Seams (1790) Jun 1956D/D PRO/NCB/6/123

No. 1 Area. New Cross Hands Colliery. Big Vein (1785) Apr 1956D/D PRO/NCB/6/124

No. 1 Area. Clydach Merthyr Colliery. Swansea Four Feet, Graigola and Maesmelyn Seams (1782) Mar 1956D/D PRO/NCB/6/125

No. 1 Area. Hendy Merthyr Colliery. Upper Maesmelyn Colliery (1781) Mar 1956D/D PRO/NCB/6/126

No. 1 Area. Felinfran Colliery. Graigola Seam.(1779) Mar 1956D/D PRO/NCB/6/127

No. 9 Area. Rhydyfro Borehole. A. Seams and Thin Coals between 1000ft and 1568ft. B. Summary of Seams (1777) Feb 1956D/D PRO/NCB/6/128

No. 1 Area. Cynheidre Colliery. Seams in No. 1 and No. 2 Shafts. Second Interim Report on Analyses (1774) Feb 1956D/D PRO/NCB/6/129

No. 9 Area. Rhydyfro Borehole. Seams and Thin Coals to depth of 1000ft (1767) Jan 1956D/D PRO/NCB/6/130

No. 9 Area. Onllwyn No. 1 Colliery. Seam exposed in the roof of the Eighteen Foot Workings (1765) Jan 1956D/D PRO/NCB/6/131

No. 1 Area. Great Mountain Colliery. Big Green, Braslyd and Triquart Seams (1762) Dec. 1955D/D PRO/NCB/6/132

No. 1 Area. Mynydd Newydd Colliery. Swansea Five Feet Seam (1760) Dec 1955D/D PRO/NCB/6/133

No. 9 Area. Abernant Colliery. Analyses of Seams in the North and South Shafts. First Interim Report (1759) Nov. 1955D/D PRO/NCB/6/134

No. 1 Area. Carway Colliery. Felin and Thin Seam between Big and Felin (1758) No. 1955D/D PRO/NCB/6/135

No. 9 Area. Cwmllwynfell Colliery. Lower Vein (1755) Nov 1955D/D PRO/NCB/6/136

No. 9 Area. Onllwyn No. 3 Colliery. Eighteen Feet and Cornish Four Feet Seams (1754) Nov. 1955D/D PRO/NCB/6/137

Preliminary trials of a Baird and Tatlock Adiabatic Calorimeter (2059) Jul 1962D/D PRO/NCB/6/138

No. 1 Area. Cynheidre Colliery. Analyses of Ash of Coal and Associated Strata (2056) Jun 1962D/D PRO/NCB/6/139

No. 1 Area. Brynlliw and Mountain Collieries. Swansea Six Feet Seam (2049) Mar 1962D/D PRO/NCB/6/140

1960 Gross Output of Individual Seams Analysed in terms of Clean Coal and Dirt Data for Area 9 (2036/9) Oct 1961D/D PRO/NCB/6/141

1960 Gross Output of Individual Seams Analysed in terms of Clean Coal and Dirt Data for Area 1 (2036/1) Oct 1961D/D PRO/NCB/6/142

Cwmgwili Colliery. Big Vein (2035) Oct 1961D/D PRO/NCB/6/143

Pentremawr Colliery. Gras Vein (2034) Oct 1961D/D PRO/NCB/6/144

Dillwyn Colliery. Red Vein (2033) Oct 1961D/D PRO/NCB/6/145

No. 9 Area. Cwmgorse Colliery. Red Vein (2020) Jun 1961D/D PRO/NCB/6/146

No. 9 Area. Gwaun-Cae-Gurwen, East Pit. Lower Vein, (Lower Gellideg) (2012) Mar 1961D/D PRO/NCB/6/147

No. 9 Area. Pwllbach Colliery - Red Vein (2011) Mar 1961D/D PRO/NCB/6/148

No. 9 Area. Pantyffynnon Colliery. Part I: Rock Seam. Part II: Stanllyd Seam (2009) Feb 1961D/D PRO/NCB/6/149

No. 1 Area. Cynheidre Colliery: Cross Measure 5 (I) Sequence and Structure (Divisional Geologists Report) (II) Seam Analyses and Characteristics (Coal Survey Report) (1991) Sep 1961D/D PRO/NCB/6/150

Area No. 1. Cynheidre Colliery. Gras Seam (1990) Oct 1960D/D PRO/NCB/6/151

No. 1 Area. Great Mountain Colliery. The Big, Braslyd and Trichwart Seams (1983) May 1960D/D PRO/NCB/6/152

Area No. 1. Cynheidre No. 3 Colliery. Braslyd Seam (1977) Apr 1960D/D PRO/NCB/6/153

No. 1 Area. Pentremawr Colliery. Big (Hwch) Vein (1966) Nov 1959D/D PRO/NCB/6/154

No. 1 Area. Pentremawr Colliery. Pumpquart Vein (1965) Nov 1959D/D PRO/NCB/6/155

No. 9 Area. Treforgan Drift. Upper Welsh Seam (2159) Jul 1964D/D PRO/NCB/6/156

No. 9 Area. Cefn Coed Colliery. Dulais Seam (2157) May 1964D/D PRO/NCB/6/157

Slip and Cleating in the Coal Seams of South Wales (2150) Apr 1964D/D PRO/NCB/6/158

No. 1 Area. Blaenant Colliery. No. 2 Rhondda Seam. Final Report on Three Samples. (2142) Feb 1964D/D PRO/NCB/6/159

No. 9 Area. Interim Report. Butchers Borehole: Bettws Red Vein and Seam at 568 ft 6 in (2141) Feb 1964D/D PRO/NCB/6/160

Hardgrave Grindability Index Interim Report (2136) Feb 1964D/D PRO/NCB/6/161

No. 9 Area. Abernant Colliery. Red Vein (2131) Jan 1964D/D PRO/NCB/6/162a-b

No. 9 Area. Blaenant Colliery. No. 2 Rhondda Seam (2125) Nov 1963D/D PRO/NCB/6/163

No. 9 Area. Glyncastle Colliery. Six Feet Seam (2122) Oct 1963D/D PRO/NCB/6/164

No. 1 Area. Brynlliw Colliery. Swansea Six Feet Seam (2121) Oct 1963D/D PRO/NCB/6/165

The Mineral Analysis of Washery Plant Coal Products (2117) Sep 1963D/D PRO/NCB/6/166

No. 1 Area. Cynheidre Colliery. Pumpquart Seam (2112) Aug 1963D/D PRO/NCB/6/167

No. 1 Area. The Big Vein at Cwmgwili Colliery (2111) Aug 1963D/D PRO/NCB/6/168

No 9 Area. Interim Report. Abernant Colliery. Red Vein (2083) Mar 1963D/D PRO/NCB/6/169a-b

A Comparative Study of the Leitz Heating Microscope and the Carbolite Ash Fusion Furnace with Special Reference to Reducing Atmospheres. By G. C. Court and H. F. Adams (2071) Oct 1962D/D PRO/NCB/6/170

Production Department (Geological Branch) And Scientific Department (Coal Survey) report entitled Five Surface Boreholes At Cynheidre Colliery. Boreholes 3/1, 3/2, 4/1, 4/2, 5/1. No. 1 (Swansea) Area. Part I - General Report (2065) Sep 1962D/D PRO/NCB/6/171

Production Department (Geological Branch) And Scientific Department (Coal Survey) report on Five Surface Boreholes At Cynheidre Colliery. Boreholes 3/1, 3/2, 4/1, 4/2, 5/1. No. 1 (Swansea) Area. Part II - Borehole 3/1. Part III - Borehole 3/2 (2065) Sep 1962D/D PRO/NCB/6/172

Production Department (Geological Branch) And Scientific Department (Coal Survey) report on Five Surface Boreholes At Cynheidre Colliery Boreholes 3/1, 3/2, 4/1, 4/2, 5/1. No. 1 (Swansea) Area. Part IV - Borehole 4/1. Part V - Borehole 4/2. Part VI - Borehole 5/1 (2065) Sep 1962D/D PRO/NCB/6/173

Chlorine in Anthracite: an Investigation of Abnormalities by H. F. Adams (2212) Jul 1965D/D PRO/NCB/6/174

No. 2 Area. Yniscedwyn Colliery. White (Four Feet) Seam (2208) May 1965D/D PRO/NCB/6/175

No. 9 Area. Ammanford Colliery. Wigan Seam (Standard Four Feet) (2007) Feb 1961D/D PRO/NCB/6/176

Production Department (Geological Branch) And Scientific Department (Coal Survey) Report on Butchers Surface Borehole near Betws, Ammanford. No. 1 (Swansea) Area (2203) Apr 1965D/D PRO/NCB/6/177

Scientific Department (Coal Survey) South Western Division. No. 9 Area. Abernant Colliery - Red Vein (2191) Feb 1965D/D PRO/NCB/6/178

Scientific Department (Coal Survey) South Western Division. No. 1 Area. Abernant Colliery - Red Vein (2191) Feb 1965D/D PRO/NCB/6/179

Scientific Department (Coal Survey) South Western Division. No. 9 Area. Pwllbach Colliery - Red Vein (2190) Feb 1965D/D PRO/NCB/6/180

Hardgrove Grindability Index and Ash Characteristics of Coals Supplied to P.F.Stations of the C.E.G.B (2178) Nov 1964D/D PRO/NCB/6/181

St Johns Colliery. Surface Reports - Nos. 1 and 2. Mar 1968D/D PRO/NCB/6/182

No. 1 Area. Yniscedwyn Colliery. Black (Upper Six Feet) Seam (2314) Nov 1966D/D PRO/NCB/6/183

No. 1 Area. Mountain and Garngoch No. 3 Collieries. Swansea Three Feet Seam (2217) Jul 1966D/D PRO/NCB/6/184

The Determination of Phosphorus in Coal and Coke by Oxygen Flask Combustion Method, by J. A. Lawrence (2240) Oct 1965D/D PRO/NCB/6/185

The Mineral Analysis of Washery Plant Products Part II, by J. A. Lawrence (2236) Sep 1965D/D PRO/NCB/6/186

Memorandum from the Administrative Officer, Scientific Department to the Area Chief Scientists and the Head of Radstock Library enclosing a copy of the report Chlorine in Anthracite - An Investigation of Abnormalities. Jul 1965D/D PRO/NCB/6/187

Scientific Department (Coal Survey) South Western Division. No. 9 Area. Dillwyn Colliery - Red Vein (2189) Feb 1965D/D PRO/NCB/6/188

No. 9 Area. Treforgan Drift. Lower Pinchin Seam (2183) Dec 1964D/D PRO/NCB/6/189

Letter and report on the results of tests carried out on Ammanford Culm Treated at Gwaun Cae Gurwen Washery. May 1952D/D PRO/NCB/6/190

Carbonate Carbon Dioxide in Coal. Trials of a Rapid Titrimetric Method of Determination (2244) Feb 1966D/D PRO/NCB/6/191

Dunraven-Hendre Gol Opencast Site. Four Feet, Six Feet, and Nine Feet Seams. An Appraisal of Seam Quality (1532) Jan 1953D/D PRO/NCB/6/192

Gross Output for 1948 and 1949. Analysis in terms of Seam Horizon, Coal Type, Ash and Sulphur Contents of Seams in Situ. South Western Division:- Summary 1322, South Wales:- 1318 and 1319, Forest of Dean:- 1320, Bristol and Somerset:- 1321 (1318, 1319, 1320, 1321, 1322) Mar 1950D/D PRO/NCB/6/193

No. 9 Area. New Llwyn-on Licensed Mine, No. 2 Rhondda (1608) Oct 1953D/D PRO/NCB/6/194

Area No. 9. Rhydwen Opencast Site. Stwrin and White Four Feet Seams (1683) Sep 1954D/D PRO/NCB/6/195

Trials with the Oldbury Stoker at Navigation Colliery, Crumlin No. 6 Area. Test 2 - Rhymney Valley Washed Duff (D9/SR/17) Jan 1949D/D PRO/NCB/6/196

Instruction handout: How to Set Up a Microscope. n.d.D/D PRO/NCB/6/197

Instruction handout: Donts in Using the Microscope. n.d.D/D PRO/NCB/6/198

Area. No. 9. Opencast Trial Pits. Black Seam, Penperlyn Site (53/54/9/OC) Nov 1954D/D PRO/NCB/6/199

Report on Bradford Breaker tests on samples from the Dry Steam Collieries of Group 2, No. 1 Area. Nov. 1954D/D PRO/NCB/6/200

Area No. 9. Opencast Trial Pits. White 4ft Seam, Brynmorgan Site (51/54/9/OC) Nov 1954D/D PRO/NCB/6/201

Area No. 9. Opencast Trial Pits. Soap Vein, Penperlyn Site (50/54/9/OC) Oct 1954D/D PRO/NCB/6/202

Area No. 9. Opencast Trial Pits. White 4 Ft and Upper Pencraig Seams, Penperlyn Site (49/54/9/OC) Oct 1954D/D PRO/NCB/6/203

Area. No. 1. Opencast Trial Pit at Morlais (48/54/O/C) Sep 1954D/D PRO/NCB/6/204

Area No. 1. Opencast Trial Pit at Pant-y-felin (Sep 1954) Sep 1954D/D PRO/NCB/6/205

Area No 9. Licensed Mine: Primrose 1954 (46/54/9) Sep 1954D/D PRO/NCB/6/206

Area No. 1. Great Mountain Colliery. Identification of Unknown Seam. No. 2 Slant - 2E Driveage (45/54/1) Aug 1954D/D PRO/NCB/6/207

Area No. 1. Opencast Trial Pits at Porth Dafen (44/54/O/C) Aug 1954D/D PRO/NCB/6/208

Opencast Trial Pit - at Penperlyn Site. Upper Pencraig Seam (43/54/O/C) Jul 1954D/D PRO/NCB/6/209

Cae Duke Coal. (42/54/1) Jul 1954D/D PRO/NCB/6/210a-b

Stool Bottom Grate v. Improved Tithe Open Grate (41/54/A) Jul 1954D/D PRO/NCB/6/211

Area No. 1. Garngoch No. 3 Colliery. Swansea 3Ft Seam at New Drift off 6ft (40/54/1) Jun 1954D/D PRO/NCB/6/212

Area No. 1. Mountain Colliery. Swansea 6Ft Seam at B and C Faces (39/54/1) Jun 1954D/D PRO/NCB/6/213

Area No. 9. Cefn Coed Colliery. Borehole Samples of Dulais and Peaock Seams (38/54/9) Jun 1954D/D PRO/NCB/6/214

Open Fires Tests on Experimental Ovoids (37/54/A) May 1954D/D PRO/NCB/6/215

Ynisarwed Colliery. Red Vein Seam (May 1954) May 1954D/D PRO/NCB/6/216

Appliance Tests on C.R.E. Experimental Ovoids (35/54/A) Apr 1954D/D PRO/NCB/6/217

Comparative Trials of North Eastern and South Western Types of Haldane Equipment (33A/54/DA) Mar 1954D/D PRO/NCB/6/218

Procedure to be adopted in Sampling Washery Products (34/54/1 and 9) Apr 1954D/D PRO/NCB/6/219

Degradation of Anthracite Peas Transported to Portishead (33/54/9) Mar 1954D/D PRO/NCB/6/220

Pentremawr and Trimsaran Washeries (32/54/1) Feb 1954D/D PRO/NCB/6/221

Hendy Merthyr Colliery. Ignition (31/54/1) Feb 1954D/D PRO/NCB/6/222

Pentremawr Colliery. Run of Mine Test. Pumpquart and Big Vein Districts (30/54/1) Feb 1954D/D PRO/NCB/6/223

Nantgarw Coke. Domestic Appliance Test (29/54/A) Jan 1954D/D PRO/NCB/6/224

Annual Report 1953 (29/54/1 - 9) Jan 1954D/D PRO/NCB/6/225

Special Mine Air Survey. Great Mountain No. 1 Colliery (28/54/1) Jan 1954D/D PRO/NCB/6/226

Cefn Coed Colliery. Nine Feet Seam (27/54/9) Jan 1954D/D PRO/NCB/6/227

Opencast Trial Pit - Penperlan Site Seam Samples. White Four Foot and Stwrin (26/54/OC) Jan 1954D/D PRO/NCB/6/228

Opencast Trial Pit - Varteg Site Seam Samples. Upper and Lower Pinchin. (25/54/OC) Jan 1954D/D PRO/NCB/6/229

Report and Memorandum relating to the Opencast Trial Pit No. 1 at Varteg, Crynant (25/53/OC) Dec. 1953D/D PRO/NCB/6/230

Covering letter and reports on the results of trials of opencast mining at Bynea, Clyn-du Cwmllethryd (24/53/OC) Dec 1953D/D PRO/NCB/6/231

Special Mine Air Survey. Cynheidre No. 3 (23/53/1) Dec 1953D/D PRO/NCB/6/232

Carway Opencast Coal, Coedbach Washery (22/53/OC) Nov 1953D/D PRO/NCB/6/233

Testing of Domestic Coals: A Suggested Classification (21/53/A) Oct 1953D/D PRO/NCB/6/234

The Degradation of Run-of-Mine Anthracite by Skip Winding (20/53/9) Sep 1953D/D PRO/NCB/6/235

Trials on Coals from Ogilvie Colliery (19/53/A) Jul 1953D/D PRO/NCB/6/236

Tests on Run of Mine Coal from the Seams of Onllwyn No. 3 Colliery (18/53/9) Jul 1953D/D PRO/NCB/6/237

Carway - Trimsaran Collieries. Saleable Percentages (17/53/1) Jun 1953D/D PRO/NCB/6/238

Morlais Colliery, Brynlliw area - gas emission surveys (16/53/1) May 1953D/D PRO/NCB/6/238a

Gellyceidrim Colliery. Un-named, Middle and Stinking Vein (15/53/9) Apr 1953D/D PRO/NCB/6/239

Garngoch No.3 Colliery. Gas Emission Tests - Brynlliw Area. E Conveyor Penderry District (14/53/1) Apr 1953D/D PRO/NCB/6/240

Mountain Colliery. Brynlliw Area - Gas Emission Surveys. B Conveyor East Side (13/53/1) Apr 1953D/D PRO/NCB/6/241

Mountain Colliery. Run of Mine Test. New Development Area. No. 2 Conveyor (10/53/1) Mar 1953D/D PRO/NCB/6/242

Rhyd Seam. Rock Colliery (9/53/A) Mar 1953D/D PRO/NCB/6/243

Onllwyn Central Washery. Operating Gravity (7/53/CW) Feb 1953D/D PRO/NCB/6/244

Tests on Nantgarw Coke Beans. Complaint Sample (6/C/C) Feb 1953D/D PRO/NCB/6/245

Test on Mount Colliery Products (5/A/OF/GF) Jan 1953D/D PRO/NCB/6/246

Anthracite Open Fire Tests. Comparison Between Two Test Bays (4/A/OF) Jan 1953D/D PRO/NCB/6/247

Domestic Fuel Testing Laboratory House Coal Open Fire Tests (3/HC/OF) Oct 1952D/D PRO/NCB/6/248

Nantgarw Coke Beans Open Fire Test (2/C/OF) Jan 1953D/D PRO/NCB/6/249

Domestic Fuel Testing Laboratory Anthracite Open Fire Tests (2/A/OF) Aug 1952D/D PRO/NCB/6/250

Domestic Fuel Testing Laboratory Anthracite Open Fire Tests (1/A/OF) n.d (Jun 1952)D/D PRO/NCB/6/251

Survey of Anthracite Duff and Slurry Stocks. Mar/May 1951D/D PRO/NCB/6/252a-b

A Summary of Work Carried Out in the Tayco 21M Domestic Boiler from 5th September until 7th November, 1955 (104/56/A) Feb 1956D/D PRO/NCB/6/253

Performance Test in Stool-Bottom Grate. South Western Division House Coals (103/56/A) Feb 1956D/D PRO/NCB/6/254

Opencast Trial Pit Bryn Morgan Site. Pit No. 2 White Four Ft Seam, Pit No. 3 Upper Black Seam (102/56/9/O.C.) Feb 1956D/D PRO/NCB/6/255

Opencast Trial Pit at Trimsaran Wood (101/56/1) Jan 1956D/D PRO/NCB/6/256

Opencast Working at Bryn Morgan Site (D9/127/56) n.d.D/D PRO/NCB/6/257

Area No. 1. Opencast Trial at Syddyn (100/56/1) Jan 1956D/D PRO/NCB/6/258

Check Tests on Radiometer (99/56/A) Jan 1956D/D PRO/NCB/6/259

Annual Report - 1955 (98/56/1 - 9) Jan 1956D/D PRO/NCB/6/260

New Crosshands Colliery. Examination of Colliery Loss and Washery Discards (97/55/1) Dec 1955D/D PRO/NCB/6/261

Installation Check Tests on Stool-Bottom Grate (96/55/A) Dec. 1955D/D PRO/NCB/6/262

Licensed Mine. Cefn Uchaf Level (95/55/9) Also includes attached memoranda. Nov 1955D/D PRO/NCB/6/263

Area No. 9. Losses Due to Inclusion of Anthracite Grains in Washed and Dry Duff (95/55/9) Dec 1955D/D PRO/NCB/6/264

Graig Merthyr Colliery. Degradation of Sized Coal in Preparation Plant (94/55/1) Nov 1955D/D PRO/NCB/6/265

Organisation as at November 1955 (92/1/9/A) Nov. 1955D/D PRO/NCB/6/266

Test Results Gravity Feed Bottles (91/55/A) Sep 1955D/D PRO/NCB/6/267

Appliance Tests on Experimental Briquettes from C.R.E. No. 1 (90/55/A) Sep 1955D/D PRO/NCB/6/268

Licensed Mine Penrhiw Level (89/55/9) Sep 1955D/D PRO/NCB/6/269

Opencast Trial Pit Varteg Isaf Site. Pit No. 6 Bore Hole 58 (88/55/9/O.C.) Sep 1955D/D PRO/NCB/6/270

Opencast Trial Pit. Globe Inn Site. Harnlo Pit No. 2, Bore Hole 31 (87/55/9/O.C.) Sep 1955D/D PRO/NCB/6/271

Opencast trial pit, Globe Inn site, Pit No. 3, Bore Hole 44 (92/55/9/O.C) Oct 1955D/D PRO/NCB/6/271a

Testing of Domestic Coke in the Tayco 21 M Domestic Boiler. Notes on Preliminary Trials (86/55/A) Sep 1955D/D PRO/NCB/6/272

Notes on the Testing of Domestic Coke in the Fulham Mark II Grate (85/55/A) Sep 1955D/D PRO/NCB/6/273a-b

Lea Valley Boiler Trials. Gravity Feed v Handfired Stokers (84/55/A). Sep 1955D/D PRO/NCB/6/274a-b

Opencast Trial Pit, Globe Inn Site. Big Vein Pit No.1, Borehole 4 (83/55/9/O.C.) Aug 1955D/D PRO/NCB/6/275

Test Results Agamatic Boiler (82/55/A) Sep 1955D/D PRO/NCB/6/276

Area No. 1. Losses due to Inclusion of Anthracite Grains in Washed and Dry Duff (81/55/1) Jul 1955D/D PRO/NCB/6/277

Opencast Trial Pits Trimsaran Wood Site. Big Vein Seam Pit No. 2 (80/55/9/O.C.) Aug 1955D/D PRO/NCB/6/278

Opencast Trial Pits Varteg Isaf Site. Rider to Lower Welsh Seam. Pit No. 5 (79/55/9/O.C.) Jul 1955D/D PRO/NCB/6/279

Area No. 9. Losses Due to Inclusion of Anthracite Grains in Washed and Dry Duff (78/55/9) Jul 1955D/D PRO/NCB/6/280

Area No. 1. Opencast Trial at Garngoch (77/55/1) Jul 1955D/D PRO/NCB/6/281

Area No. 1. Opencast Trial Pit at Clyndu (76/55/1) May 1955D/D PRO/NCB/6/282

Method of Testing Fuel in the Agamatic Boiler (75/55/A) May 1955D/D PRO/NCB/6/283

Lea Valley Boiler Trials. Interim Report (74/55/A) May 1955D/D PRO/NCB/6/284 a-b

Area No. 1. Opencast Trial Pit at Grovesend (73/55/1) May 1955D/D PRO/NCB/6/285

Area No.1. Opencast Trial Pit at Coal Pit Hall (72/55/1) May 1955D/D PRO/NCB/6/286

Washability Tests on Run of Mine Coal from Seams to be Washed at Aberpergwm Washery (71/55/9) Jun 1955D/D PRO/NCB/6/287

Tests on Pithers No. 2 Unique Stove (70/55/A) Apr 1955D/D PRO/NCB/6/288

Felinfran Products (69/55/1) Apr 1955D/D PRO/NCB/6/289

Area No.1. Trials on Pentremawr Culm at Coedbach Washery (68/55/1) Apr 1955D/D PRO/NCB/6/290

Test Results: Gravity Feed Boilers (67/55/A) Apr 1955D/D PRO/NCB/6/291

Test Results: Fulham Mark II (66/55/A) Apr 1955D/D PRO/NCB/6/292

Test Results: Agamatic Boiler (65/55/A) Apr 1955D/D PRO/NCB/6/293

South Wales House Coal. Test Results (64/55/A) Apr 1955D/D PRO/NCB/6/294

Opencast Trial Pits. Varteg Isaf Site - Pit No. 4 (63/55/9/O.C.) Mar 1955D/D PRO/NCB/6/295

New Licensed Mine, Dderi Level, No. 9 Area (62/55/9) Mar 1955D/D PRO/NCB/6/296

Opencast trial Pits. Varteg Isaf Site - Pit No. 3, Rhos Cottage Site - Pit No. 2 (61/55/9/O.C.) Mar 1955D/D PRO/NCB/6/297

Determination of Moisture in Coal. Comparison of results obtained with Griffin and Tatlock Oven and Wandless Minimum Space Oven (60/55/1) Mar 1955D/D PRO/NCB/6/298

Opencast Trial Pits, Varteg Isaf Site. Lower Welsh Seam, Pit Nos 1 & 2 (59/55/9/O.C.) Feb 1955D/D PRO/NCB/6/299

Opencast Working at Varteg Isaf (D9/176/55) 1955D/D PRO/NCB/6/300

Saron Colliery. Charcoal Seam (57/55/9) Dec. 1954D/D PRO/NCB/6/301

Annual Report - 1954 (56/55/1 - 9) Jan 1955D/D PRO/NCB/6/302

Opencast Trial Pits, Penstack Site. Big Vein and Black Vein (55/55/9/O.C.) Jan 1955D/D PRO/NCB/6/303

Opencast Trial Pits, Gwaun-Ton Site. White 4 Ft. Seam and Black Vein (54/55/9/ O.C.) Jan 1955D/D PRO/NCB/6/304

Opencast Trial Pit - Cwmgrach Site, Seam Samples. 6Ft. Seam (154/56/9/O.C.) Dec 1956D/D PRO/NCB/6/305

No. 9 Area. Wernos Colliery. Two Unidentified Seams (153/56/9) Nov. 1956D/D PRO/NCB/6/306

Opencast Trial Pit - Cwmgrach Site, Seam Samples. Red Vein. (152/56/9/O.C.) Nov 1956D/D PRO/NCB/6/307

Opencast Trial Pit, Bryn Morgan Site. Pit No. 6. Borehole 176. Stwrin Seam (151/56/9/O.C.) Oct 1956D/D PRO/NCB/6/308

Survey of Washery Returns (150/56/1 & 9). Also includes attached memorandum. Oct 1956D/D PRO/NCB/6/309

Volatile Matter Determination. Inter-Laboratory Checks (149/56/D.A.) Oct 1956D/D PRO/NCB/6/310

Appliance Tests on Experimental Briquettes from C.R.E (148/56/A) Oct 1956D/D PRO/NCB/6/311

No 9 Area. Wernos Colliery. Two Unidentified Seams and Ddugaled Seam (147/56/9) Oct 1956D/D PRO/NCB/6/312

Graig Merthyr Colliery. Run-of-Mine Test (146/56/1) Oct 1956D/D PRO/NCB/6/313

Raw Coal for Manufacture of Filtercoal at Port Talbot (145/56/1) Oct 1956D/D PRO/NCB/6/314

Summary of Work Carried Out in Outbursts Investigation (144/56/1 and 9). Also includes attached memoranda. Oct 1956D/D PRO/NCB/6/315

Tolerance for Volatile Matter Determination (143/56/D.A.) Oct 1956D/D PRO/NCB/6/316

Test Results for Gravity Feed Boilers (142/56/A) Sep 1956D/D PRO/NCB/6/317

Opencast Trial Pit - Cwmgrach Site Seam Samples. Upper 9 Ft. or 9 Ft (141/56/9/O.C.) Sep 1956D/D PRO/NCB/6/318

Report on Work Carried Out in the Tayco 21M Domestic Boiler on a Sample of Abercynon 4 Fseam Coal (139/56/A) Aug 1956D/D PRO/NCB/6/319

Report on Realisation Test of Run-of-Mine Steer Pit (138/56/9) Aug 1956D/D PRO/NCB/6/320

Report on Realisation Test of Run-of-Mine. East Pit (137/56/9) Aug 1956D/D PRO/NCB/6/321a-b

Opencast Trial Pit - Cwmgrach Site Seam Samples. Lower 9 Feet or Brass Vein (OL/979/56) Aug 1956D/D PRO/NCB/6/322

Report on Work Carried out in the Tayco Domestic Boiler on a Complaint Sample of Deep Navigation Small Nuts (135/56/A) Aug 1956D/D PRO/NCB/6/323

Opencast Trial Pit - Dillwyn Site Seam Samples. Lower Pinchin Vein (OL/948/56) Aug 1956D/D PRO/NCB/6/324

Investigation Carried Out at Onllwyn Brickworks (133/56/9) Aug 1956D/D PRO/NCB/6/325

Opencast Trial Pit at Mwrwg Vale (132/56/1) Aug 1956D/D PRO/NCB/6/326

Appliance Tests on Experimental Ovoids from C.R.E. Stoke Orchard (131/56/A) Jul 1956D/D PRO/NCB/6/327

Results of Radiation Tests Carried Out on Coedely and Fernhill Slurry Briquettes (130/56/A) Jul 1956D/D PRO/NCB/6/328

Opencast Trial Pit Bryn Morgan Site. Pit No. 5. Bore Hole 162. Stwrin Seam (129/56/9/O.C.) Jul 1956D/D PRO/NCB/6/329

Preliminary Trials Carried Out in the Trianco B1 Boiler Using Cwmgorse Grains (127/56/A) Jul 1956D/D PRO/NCB/6/330

Determination of Arsenic in Coal (127/56/D.A.) Jul 1956D/D PRO/NCB/6/331

Appliance Tests on Experimental Briquettes from C.R.E (126/56/A) Jun 1956D/D PRO/NCB/6/332

Large Scale Washing Test Dynant Opencast Coal Washed at Coedbach Washery (125/56/1/O.C.) Jun 1956D/D PRO/NCB/6/333

Review of Tests Carried out on South-Western Division House Coals in the Stool-Bottom Grate (124/56/A) Jun 1956D/D PRO/NCB/6/334

Installation Check Tests in the Stool Bottom Grate (123/56/A) Jun 1956D/D PRO/NCB/6/335

Special Gas Emission Survey. Garngoch No. 3 Colliery - No. 5 Conveyor Face (122/56/1) Jun 1956D/D PRO/NCB/6/336

Special Gas Emission Survey. Morlais Colliery - No. 4 Conveyor Face (121/56/1) May 1956D/D PRO/NCB/6/337

Special Gas Emission Survey. Mountain Colliery - V Conveyor Face (120/56/1) May 1956D/D PRO/NCB/6/338

Opencast Trial Pit at the Poplars (119/56/1) May 1956D/D PRO/NCB/6/339

Large Scale Washing Test. Carway Coal Washed at Coedbach Washery. Float and Sink Tests and Analysis (118/56/1/O.C.) May 1956D/D PRO/NCB/6/340

Special Gas Emission Survey. Garngoch No. 3 Colliery - G Conveyor Face (117/56/1) May 1956D/D PRO/NCB/6/341

Special Gas Emission Survey. Graig Merthyr Colliery - JE Conveyor Face (116/56/1) May 1956D/D PRO/NCB/6/342

Large Scale Washing Test. Carway Coal Washed at Coedbach Washery (115/56/1/O.C.) May 1956D/D PRO/NCB/6/343

Testing of Domestic Coke in the Fulham Mark II Improved Grate. Installation Check Tests (114/56/A) May 1956D/D PRO/NCB/6/344

Special Gas Emission Survey. Morlais Colliery - A Conveyor Face (113/56/1) May 1956D/D PRO/NCB/6/345

Opencast Trial Pit at Penllergaer (112/56/1) May 1956D/D PRO/NCB/6/346

Grains and Peas in Dry Duff (111/56/9) Apr 1956D/D PRO/NCB/6/347

Opencast Trial Pit Bryn Morgan Site. Pit No. 4. Bore Hole 133. Stwrin Seam (110/56/9/O.C.) Apr 1956D/D PRO/NCB/6/348

Notes on Testing of Domestic Coke in the Tayco 21M Domestic Boiler (109/56/A) Apr 1956D/D PRO/NCB/6/349

Test Results. Gravity Feed Boilers (108/56/A) Apr 1956D/D PRO/NCB/6/350

Pantyffynon Colliery. Gras Isaf Seam (107/56/9) Mar 1956D/D PRO/NCB/6/351

Losses due to Inclusion of Anthracite Grains in Washed and Dry Duff. Fourth Report (106/56/9) Mar 1956D/D PRO/NCB/6/352

Arsenic in Anthracite and Dry Steam Coals (105/56/1 & 9) Annotated in ink Part One Feb 1956D/D PRO/NCB/6/353

Morlais. Investigation to determine the best position for the installation of a breaker in order to produce the maximum yield of coal in the proposed Heavy Medium Washery at Morlais Colliery. Period of Test Aug 1957 (206/57/1) Sep 1957D/D PRO/NCB/6/354

Report on work carried out on the Phurnacite complaint sample supplied by J. R. Wood, and Co. Ltd., Poole, Dorset (205/57/A) Sep 1957D/D PRO/NCB/6/355

Report on work carried out at Cwmdu on a sample of complaint Grains (Pentremawr ex Wagon No.B566140, July 6th, 1957) (204/57/A) Sep 1957D/D PRO/NCB/6/356

Appliance tests carried out on Samples of Phurnacite supplied by the Divisional Laboratory, Ystrad Mynach (203/57/A) Sep 1957D/D PRO/NCB/6/357

Report on work carried out in the Fulham grate and Tayco boiler on the Phurnacite complaint sample supplied by the Divisional Carbonisation Scientist, Ystrad Mynach (202/57/A) Aug 1957D/D PRO/NCB/6/358

Opencast Trial Pit - Gurnos Site. Unidentified Seam. Pit No. 1 - Bore Hole 29 (201/57/9/O.C.) Aug 1957D/D PRO/NCB/6/359

Check on Fuel Measuring Devices used on Trianco Boiler (200/57/A) Jul 1957D/D PRO/NCB/6/360

Appliance Tests on a Reactive Fuel Prepared at the Robin Hood Plant, North Eastern Division (199/57/A) Jul 1957D/D PRO/NCB/6/361

Appliance Tests Carried Out on a Sample of Mountain Ash Ovoids Prepared from Blaenhirwaun Washed Products (198/57/A) Jul 1957D/D PRO/NCB/6/362

Further Tests on the Trianco P. 50 Gravity Feed Boiler (197/57/A) Jul 1957D/D PRO/NCB/6/363

Report on Licensed Mine. White Rock Level (196/57/1) Jul 1957D/D PRO/NCB/6/364

Washery Refuse Tips at Cross Hands and Great Mountain Collieries (195/57/1) Jul 1957D/D PRO/NCB/6/365

Report on Work Carried Out on the Fulham Grate and Tayco Boiler on Phurnacite Complaint Samples (194/57/A) Jul 1957D/D PRO/NCB/6/366

Appliance Tests on C.R.E. Anthracite Pellets (193/57/A) Jun 1957D/D PRO/NCB/6/367

Dillwyn No 1 Slant gas analysis after shot firing using Hydrobel explosive (192/57/9) Jun 1957D/D PRO/NCB/6/367a

Unidentified Seam Great Mountain Colliery (191/57/1) Jun 1957D/D PRO/NCB/6/368

Appliance Tests on C.R.E. Experimental Briquettes (191/57/A) Jun 1957D/D PRO/NCB/6/369

Opencast Trial Pit - Cwmgrach No. 2. 9 ft. Seam (190/57/9) Jun 1957D/D PRO/NCB/6/370

Onllwyn No. 3 Colliery. Brass Vein (189/57/9) Jun 1957D/D PRO/NCB/6/371

Report on Licensed Mine. Graig Cil Hendre Level. Maenmelyn Seam (188/57/1) Jun 1957D/D PRO/NCB/6/372

Report on Licensed Mine. Craig Melyn Level. Maenmelyn Seam (187/57/1) Jun 1957D/D PRO/NCB/6/373

Report on Licensed Mine. Gellinon Level. Graigola Seam (186/57/1) Jun 1957D/D PRO/NCB/6/374

Testing of Domestic Coals. Performance Tests Carried out in the Stool Bottom Grate on Caerau and Coegnant House Coals (185/57/A) Jun 1957D/D PRO/NCB/6/375

Appliance Tests on Mountain Ash Ovoids (183/57/A) May 1957D/D PRO/NCB/6/376

Cwmgrach Opencast Pit No. 1 (182/57/9/O.C.) May 1957D/D PRO/NCB/6/377

Dillwyn Opencast Site. Lower Pinchin Seam (181/57/9/O.C.) May 1957D/D PRO/NCB/6/378

Appliance Tests on Phurnacite Ovoids (180/57/A) May 1957D/D PRO/NCB/6/379

Installation Check Tests on the Stool Bottom Grate (179/57/A) Apr 1957D/D PRO/NCB/6/380

Tests on Phurnacite Ovoids (178/57/A) Apr 1957D/D PRO/NCB/6/381

Opencast Trial Pit - Llwyn Site. Yard Seam (177/57/9/O.C.). Also includes attached memoranda. Apr 1957D/D PRO/NCB/6/382

Opencast Trial Pit No. 4 - Six Feet and Rider Seams. Seam Samples (176/57/9/O.C.) Annoted in ink Abercrave Site Apr 1957D/D PRO/NCB/6/383

Report on Realisation Test of Run-Of-Mine Steer Pit (174/57/9) Apr 1957D/D PRO/NCB/6/384a-b

Approval Testing of Automatic Gravity Feed Anthracite Boilers for Inclusion in the list of Approved Appliances - Earleymill 01 Boiler (173/57/A). Memorandum attached. Mar 1957D/D PRO/NCB/6/385

Area No. 1 Opencast Trial Pit at Pont-Henry (172/57/1 O/C) May 1957D/D PRO/NCB/6/386

Special Gas Emission Survey. Garngoch No. 3 Colliery - H & G Conveyor (171/57/1) Mar 1957D/D PRO/NCB/6/387

Report On Heating Of Mansion House, Swansea (170/57/A) with addenda Mar 1957D/D PRO/NCB/6/388

Opencast Trial Pit - Bryn Morgan Site. Seam Samples. Pit No. 9 - Bore Hole 316 (169/57/9/O.C.) Mar 1957D/D PRO/NCB/6/389

Opencast Trial Pit - Llwyn Pica site, seam samples, Greys Seam (168/57/9/OC) Feb 1957D/D PRO/NCB/6/389a

Cwm Coal - Open Fire Test (167/57/A) Feb 1957D/D PRO/NCB/6/390

Opencast Trial Pit - Bryn Morgan Site, Seam Samples. Pit No. 8 - Bore Hole 264 (166/57/9/O.C.) Feb 1957D/D PRO/NCB/6/391

Morlais Colliery. Run-Of-Mine Test. Swansea Five Feet Seam (165/57/1) Feb 1957D/D PRO/NCB/6/392

Determination of Arsenic by two Modifications of the Case Method (165/57/D.A.) Jan 1957D/D PRO/NCB/6/393

Annual Report 1956 (164/57/1 - 9) Jan 1957D/D PRO/NCB/6/394

Opencast Trial Pit - Abercrave Site. Seam Samples Black Vein (163/57/9/O.C.) Jan 1957D/D PRO/NCB/6/395

Opencast Trial Pit - Dillwyn Site. Seam Samples Lower Pinchin (162/57/9/O.C.) Jan 1957D/D PRO/NCB/6/396

Morlais Colliery. Run-Of-Mine Test (161/57/1) Jan 1957D/D PRO/NCB/6/397

Opencast Trial Pit - Bryn Morgan Site. Seam Samples. Pit No. 7 - Bore Hole 248 (160/57/9/O.C.) Jan 1957D/D PRO/NCB/6/398

Appliance Tests on C.R.E. Carbonised Ovoids (159/57/A) Jan 1957D/D PRO/NCB/6/399

No. 9 Area. Methane Drainage. Annual Report 1955 (188A/56/9) n.d. {1956}D/D PRO/NCB/6/400

Opencast Trial Pit - Abercrave Site Seam Samples. Stwrin Seam (158/56/9/O.C.) Dec 1956D/D PRO/NCB/6/401

Opencast Trial Pit - Cwmgrach Site. Seam Samples, Bluers Seam (157/56/9/O.C.) Dec 1957D/D PRO/NCB/6/402

Approval Testing of Automatic Gravity Feed Anthracite Boilers for Inclusion in the list of Approved Appliances (156/56/A) Dec 1956D/D PRO/NCB/6/403

Opencast Trial Pit - Llwyn Pica Site. Seam Samples, Bluers Seam. Dec 1957D/D PRO/NCB/6/404

Installation Check Tests in the Stool Bottom Grate. Walkien House Coal (257/58/A) May 1958D/D PRO/NCB/6/405

Appliance Tests on Yniscedwyn and Cefn Coed Flats (256/58/A) May 1958D/D PRO/NCB/6/406

Clydach Merthyr Colliery. Graigola and Maesmelyn Seams (255/58/1) May 1958D/D PRO/NCB/6/407

Opencast Trial Pit at Cynheidre (254/58/1) May 1958D/D PRO/NCB/6/408

Washability Tests on Run of Mine Coal From Swansea 6Ft. Seam at Mountain Colliery (253/58/1) Apr 1958D/D PRO/NCB/6/409

Analysis of O/C Coal Mined by Western Mining Co (252/58/1/O.C.) Apr 1958D/D PRO/NCB/6/410

Further Test with Lytron for use as a Flocculating agent for Slurries (251/58/9) Apr 1958D/D PRO/NCB/6/411

Tirbach Screens. Degradation of Pwllbach Coal (250/58/9) Apr 1958D/D PRO/NCB/6/412

Losses due to Inclusion of Anthracite Grains in Washed and Dry Duff. Fifth Report (249/58/9) Mar 1958D/D PRO/NCB/6/413

Yniscedwyn Colliery. Investigation of the effect of a Lobbe Hobel Plough on the yield of sized products (248/58/9) Mar 1958D/D PRO/NCB/6/414

Graig Merthyr Colliery. Graigola and Swansea 6 Ft Seams (247/58/1) Apr 1958D/D PRO/NCB/6/415

Test for Suitablity of Fuels for Gravity Feed Boilers. Preliminary Report (246/58/A) Feb 1958D/D PRO/NCB/6/416

Morlais Colliery Power Loading - Supplementary Report to 215/57/1. Ash Contents of Fractions Floating at S.G. 1.60 (245/58/1) Mar 1958D/D PRO/NCB/6/417

Seams at Cefn Coed Colliery (244/58/9) Mar 1958D/D PRO/NCB/6/418

Scientific Staff - Areas 1 and 9. 1st January 1958. Jan 1958D/D PRO/NCB/6/419

Opencast Working at Gurnos Site. Unidentified Seam (242/58/9/O.C.) Feb 1958D/D PRO/NCB/6/420

Visit to B.C.U.R.A. Laboratories. 18 December 1957 (241/58/A) Feb 1958D/D PRO/NCB/6/421

Morlais Colliery. Swansea 4Ft. and 5Ft. Seams (240/58/1) Feb 1958D/D PRO/NCB/6/422

Opencast Boreholes at Penllegaer (239/58/1 O/C) Feb 1958D/D PRO/NCB/6/423

Realisation Test of Culm ex Pentremawr Colliery as received at Coed Bach Washery (238/58/1) Feb 1958D/D PRO/NCB/6/424

Daren Colliery, Hughes Seam (237/58/1) Feb 1958D/D PRO/NCB/6/424a

Approval Testing of Automatic Gravity Feed Boilers for Inclusion in the List of Approved Appliances (236/58/A) Feb 1958D/D PRO/NCB/6/425

Approval Testing of Automatic Gravity Feed Anthracite Boilers for Inclusion in the List of Approved Appliances (235/58/A) Feb 1958D/D PRO/NCB/6/426

Results of Tests Carried Out on the Fortano Gravity Feed Boiler (234/58/A) Feb 1958D/D PRO/NCB/6/427

Annual Report 1957 (235/58/1 & 9) 1957D/D PRO/NCB/6/428

Felinfran Colliery. Run-o-Mine {sic} (232/58/1) Feb 1958D/D PRO/NCB/6/429

Carway Colliery. Ddugaled and Felyn Seams (231/58/1) Feb 1958D/D PRO/NCB/6/430

Testing of Domestic Coals. Performance tests carried out in the Stool Bottom Grate on Wyllie, Marine and International house coals (230/58/A) Feb 1958D/D PRO/NCB/6/431

The Effect of Moisture on the Combustion Characteristics of Phurnacite (229/58/A) Jan 1958D/D PRO/NCB/6/432

Great Mountain Colliery - Slant No.2. Green Vein and Big Vein Seams (228/58/1) Jan 1958D/D PRO/NCB/6/433

Cross Hands Colliery. Unidentified Seam (Rock) and Charcoal Seams (227/58/1) Jan 1958D/D PRO/NCB/6/434

Scientific Department - Areas 1 & 9. South Western Division. Research Programme - 1958 (226/58/1&9) Jan 1958D/D PRO/NCB/6/435

Duff, Large and Cobbles at Morlais Colliery. (2255/58/1) Jan 1958D/D PRO/NCB/6/436

Cwmgorse Colliery - Red Vein. Sizing Tests (224/58/9) Jan 1958D/D PRO/NCB/6/437

Comparison of the Performance of Various Anthracite Sizes in a Tayco Domestic Boiler (223/58/A) Jan 1958D/D PRO/NCB/6/438

Approval Testing of Automated Gravity Feed Anthracite Boilers for Inclusion in the List of Approved Appliances (222/58/A) Jan 1958D/D PRO/NCB/6/439

Trials of Domestic Coals. Performance Tests Carried Out in the Stool Bottom Grate on a Sample of Marine Nuts (221/58/A) Jan 1958D/D PRO/NCB/6/440

Use of a Lytron 886 for Flocculation of Slurry (220/58/1) Jan 1958D/D PRO/NCB/6/441

Experimental Utilisation of Drained Firedamp Blackstone Dual Fuel Engine at Cefn Coed Colliery (219/57/9) Dec 1957D/D PRO/NCB/6/442

Testing of Domestic Boiler. Performance tests carried out in the Stool Bottom Grate on Wyllie house coal (218/57/A) Dec 1957D/D PRO/NCB/6/443

Approval Testing of Automatic Gravity Feed Anthracite Boilers for Inclusion in the List of Approved Appliances (217/57/A) Includes attached memoranda. Dec 1957D/D PRO/NCB/6/444

Suitability Tests Performed on Morlais Coal of Different Gravity Fractions (216/57/A) Dec 1957D/D PRO/NCB/6/445

Morlais Colliery. Investigation of the effect of Power Loading on the yield of sized products (215/57/1) Dec 1957D/D PRO/NCB/6/446

Maesgwyn Cap Opencast Site. Analyses of Seams Exposed Above White Four Foot Seam. Date of Sampling 14.11.57 (214/57/9/O.C.) Nov 1957D/D PRO/NCB/6/447

Steer Colliery - Brynlloi Seam (213/57/9) Nov 1957D/D PRO/NCB/6/448

Opencast Trial Pit at Porth Dafen (212/57/1/O.C.) Nov 1957D/D PRO/NCB/6/449

Opencast Trial Pit - Cwmgrach. Cornish Seam (211/57/9/O.C.) Nov 1957D/D PRO/NCB/6/450

Preliminary Testing of the Fortano Gravity Feed Boiler (210/57/A) Oct 1957D/D PRO/NCB/6/451

Check on Fuel Measuring Devices Used on Trianco P50 Boiler (209/57/A) Oct 1957D/D PRO/NCB/6/452a-b

Testing of Coke in a Domestic Boiler (208/57/A) Oct 1957D/D PRO/NCB/6/453

Report of Work Carried Out on a Sample of Phurnacite Supplied by A.W. Davies, Esq., Technical Marketing Manager, Cardiff (207/57/A) Oct 1957D/D PRO/NCB/6/454

Breaker Test - Wernos Large. Preliminary Report (308/58/9) Nov 1958D/D PRO/NCB/6/455a-b

Breaker Test - Graig Merthyr Large. Preliminary Report (307/58/1) Nov 1958D/D PRO/NCB/6/456

Clydach Merthyr Large - Drop Tests (306/58/1) Nov 1958D/D PRO/NCB/6/457

Testing of Domestic Coal. St Johns Housecoal (305/58/A) Nov 1958D/D PRO/NCB/6/458

Bryn Morgan Opencast Site, White Seam, Pit No. 13, Bore Hole 528 (304/58/9/OC) Nov 1958D/D PRO/NCB/6/458a

Onllwyn No.3 Colliery. Nine Feet Seam. Seam Analysis (303/58/9) Nov 1958D/D PRO/NCB/6/459

Opencast Trial Pit at Penygraig (302/58/1) Oct 1958D/D PRO/NCB/6/460

Bryn Morgan Opencast Site. Upper Black Seam (301/58/9/O.C.) Oct 1958D/D PRO/NCB/6/461

Approval Testing of Anthracite Gravity Feed Boilers. Earleymil O Boiler (300/58/A) Oct 1958D/D PRO/NCB/6/462

Cross Hands Colliery. Investigation of the effect of different methods of coal winning on the yield of sized products. Part 2 (299/58/1) Oct 1958D/D PRO/NCB/6/463

Cross Hands Colliery, losses due to the inclusion of Anthracite Grains in washed and dry duff 7th Report (298/58/9) Oct 1958D/D PRO/NCB/6/463a

Cross Hands Washed Products (With Special Reference to the method of coal winning - Pulsed Infusion) (297/58/1) Oct 1958D/D PRO/NCB/6/464

Wernos Colliery - Rock Vein. Comparison of Yields of Products with A. Multi-Jib cutting and Plough, B. Pulsed Infusion Blasting (296/58/9) Oct 1958D/D PRO/NCB/6/465

Breaking of Anthracite Large, Wernos Central Washery (295/58/9) Annotated on the cover See report of later test Sep 1958D/D PRO/NCB/6/466a-c

East Cellwen Site. Unknown Seam. Trial Pit - Rip Sample (294/58/9/O.C.) Sep 1958D/D PRO/NCB/6/467

The Naylor Spiralum Type M Automatic Firedamp Alarm. Factors affecting efficient operation. Under mining conditions (293/58/9) Sep 1958D/D PRO/NCB/6/468

Mountain Colliery. Volatile Matter of Six Ft. Seam. Sep 1958D/D PRO/NCB/6/469

New Blaenhirwaun Colliery. Big Vein Seam (291/58/1) Sep 1958D/D PRO/NCB/6/470

Testing of Domestic Coals. Performance test carried out in the Stool Bottom Grate on Arthur and Edward nuts, Northern United nuts and Cannop nuts (290/58/A) Sep 1958D/D PRO/NCB/6/471

Rock Colliery. Lower Peacock Seam (289/58/9) Sep 1958D/D PRO/NCB/6/472

Analytical data of various seams. Opencast Working. National Coal Board, Areas 1 and 9 (288/58/OO.C.) Sep 1958D/D PRO/NCB/6/473

Onllwyn No.3. Colliery. White Four Ft. Seam (287/58/9) Sep 1958D/D PRO/NCB/6/474

Cynheidre Colliery. Cynheidre Coal washed at Coed Bach Washery (286/58/1) Aug 1958D/D PRO/NCB/6/475

Cross Hands Colliery. Raw Coal (ex Cross Hands Colliery) for the manufacture of Filtercoal (285/58/1) Aug 1958D/D PRO/NCB/6/476

Garngoch No. 3 Colliery. Swansea 3, 5 and 6 Seams (284/58/1) Sep 1958D/D PRO/NCB/6/477

Cross Hands Colliery. Comparison of yields with machine cutting and pulsed infusion methods of coal winning (283/58/1) Aug 1958D/D PRO/NCB/6/477a

Bryn Morgan Opencast Site. Upper Black and Unidentified Seams. Pit Nos. 10 and 11 (282/58/9/OC) Aug 1958D/D PRO/NCB/6/478

Abercrave Opencast Site. Stwrin Seam. Trial Pit No.3 (281/58/9) Jul 1958D/D PRO/NCB/6/479

Opencast Working at Bryn Morgan Site (D9/875/58) n.d.D/D PRO/NCB/6/480

Middle Vein. East Pit (280/58/9) Jul 1958D/D PRO/NCB/6/481

Mountain Colliery. Swansea 6Ft. Seam (279/58/1) 1958D/D PRO/NCB/6/482

Opencast Core Hole 106 Pen y Graig (278/58/9) Jul 1958D/D PRO/NCB/6/482a

Losses due to Inclusion of Anthracite Grains in Washed and Dry Duff. Sixth Report (277/58/9) Jul 1958D/D PRO/NCB/6/483

Gwaun Ton (Abercrave) Opencast Site. Analysis for Trial Pits 3 - 7 (276/58/9) Jun 1958D/D PRO/NCB/6/484

Washability test at Coed Bach Washery on Dynant Opencast Coal (275/58/1) Jun 1948D/D PRO/NCB/6/485

Washability test at Coed Bach Washery on Carway Deep Mined Coal (274/58/1) Jun 1958D/D PRO/NCB/6/486

Radiation Tests Performed on a Sample of Cobble Briquettes Produced at the Crown Fuel Works (273/58/A) Jun 1958D/D PRO/NCB/6/487a-b

Radiation Tests on Specially Prepared Anthracite Ovoids (272/58/A) Jun 1958D/D PRO/NCB/6/488

Investigation into the Product Quality and Clinker Formation in certain samples of Phurnacite (271/58/A) Jun 1958D/D PRO/NCB/6/489

Testing of Domestic Coals. Performance tests carried out in the Stool Bottom Grate on Caerau, Bryn, Ffaldau, Avon and Western housecoals (270/58/A) Jun 1958D/D PRO/NCB/6/490

Washability Tests on Run of Mine Coal from Swansea 6 Ft. Seam at Garngoch 3 Colliery (269/58/1) Jun 1958D/D PRO/NCB/6/491

Progress Report on recovery of Grains and Peas from Anthracite Duff - 17 Jun 1958 (268/58/9) Jun 1958D/D PRO/NCB/6/492

Onllwyn Coal Preparation Plant Froth Flotation Tailings (267/58/9) Jun 1958D/D PRO/NCB/6/493

Garngoch 3 - Large Coal (266/58/1) Jun 1958D/D PRO/NCB/6/494

Suitability of Classification of Anthracite Coals for Gravity Feed Boilers under the Small Anthracite Supply Scheme (265/58/A) Jun 1958D/D PRO/NCB/6/495

Bradford Breaker Drop Tests on Dry Steam Coals from Swansea 3,4 5, & 6 Ft. Seams. May 1958 (2644/58/1) Jun 1958D/D PRO/NCB/6/496

Determination of Arsenic in Coal British Standards Institution. Procedure for Comparative Trial of Two Methods for Committee SFE/45/8 (263/58/D.A.) Jun 1958D/D PRO/NCB/6/497

Washability Tests on Run of Mine Coal from Swansea 5 Foot Seam at Garngoch 3 Colliery (262/58/1) Jun 1958D/D PRO/NCB/6/498

Pentremawr Colliery. Pumpquart and Hwch Seams (261/58/1) May 1958D/D PRO/NCB/6/499

Size distribution of Particles in Drainage Water from Cefn Coed Colliery (260/58/9) May 1958D/D PRO/NCB/6/500

New Blaenhirwaun Colliery Big Vein Seam (259/58/1) May 1958D/D PRO/NCB/6/501

Washability Tests on Run of Mine Coal from Swansea 3 Ft. Seam at Garngoch 3 Colliery (258/58/1) May 1958D/D PRO/NCB/6/502

Globe Inn Opencast Site. Unidentified Seam, Pit No.4, Bore Hole 190 (358/59/9/O.C) May 1959D/D PRO/NCB/6/503

Rhosammon Opencast Site, Bryn Seam. Bore Holes Nos 401, 402 (357/59/9/O.C.) May 1959D/D PRO/NCB/6/504

Morlais Colliery. Swansea 4 Ft. and 5 Ft. Seams (356/59/1) May 1959D/D PRO/NCB/6/505

Results of radiation tests performed in a Stool Bottom Grate on certain South Western Division housecoals (355/59/A) May 1959D/D PRO/NCB/6/506

Aberpergwm Stove Nuts. Effect of Middlings (354/59/A) May 1959D/D PRO/NCB/6/507

Abernant Colliery - Peacock Seam (353/59/9) May 1959D/D PRO/NCB/6/508

Open Fire Tests Performed on C.R.E. Heat Treated Phoenix Briquettes (352/59/A) May 1959D/D PRO/NCB/6/509

Opencast Working, Coronation Park Site. Pit No.3 Bore Hole 182 (351/59/9/O.C.) May 1959D/D PRO/NCB/6/510

Pentremawr Colliery. Run-of-Mine Tests (350/59/1) May 1959D/D PRO/NCB/6/511

Testing of Domestic Coals. Performance tests carried out in the Stool Bottom Grate on Windsor Large and Wyllie large housecoals (349/59/A) May 1959D/D PRO/NCB/6/512

Opencast Trial Pit and borehole at Gwendraeth (348/59/1 O.C.) May 1959D/D PRO/NCB/6/512a

New Blaenhirwaun Colliery. Pumpquart, Stanllyd, Green, Gras and Big Vein Seams (347/59/1) Apr 1959D/D PRO/NCB/6/513

Great Mountain. No.1 and No.2 Colliery. Stanllyd, Big Vein, Triquart and Braslyd Seams (346/59/1) Apr 1959D/D PRO/NCB/6/514

Interim Report on the Second Model of the Watts 45a Gravity Feed Boiler (345/59/A) Apr 1959D/D PRO/NCB/6/515

Opencast Trial Pits and Boreholes at Lamberts Colliery (343/59/1. O/C) Apr 1959D/D PRO/NCB/6/516

Wernos Colliery - Stanllyd Seam. Analysis of rip Samples (342/59/9) Apr 1959D/D PRO/NCB/6/517

Opencast Trial Pit at Pen-y-Moor (341/59/1. O/C) Apr 1959D/D PRO/NCB/6/518

Ventilation Survey. Big Vein District. Carway Colliery (340/59/1) Apr 1959D/D PRO/NCB/6/519

Opencast Working at Rhosamman Site. Bryn seam, Bore Hole 326 (Core Hole of 313) (339/59/9. OC) Apr 1959D/D PRO/NCB/6/520

Comparison of Running Costs in Solid Fuel and Oil Fired Installations (338/59/A) Mar 1959D/D PRO/NCB/6/521

Graig Merthyr Colliery. Run-of-Mine test on culm from Velindre district (337/59/1) Mar 1959D/D PRO/NCB/6/522

Scraper Conveyors. The effect of Scraper Conveyors on Run-Of-Mine coal - increase of duff content (336/59/1) Mar 1959D/D PRO/NCB/6/523

Testing of Domestic Coals. Report on the performance of Cwm Cobbles in a Stool Bottom Grate (335/59/A) Mar 1959D/D PRO/NCB/6/524

An Investigation into the efficiency of an Oil-firing boiler. Watts 80 W (334/59/A) Mar 1959D/D PRO/NCB/6/525a-b

Washability test at Coed Bach Washery on Dynant Opencast Coal (333/59/O/C) Mar 1959D/D PRO/NCB/6/526

Washability test at Coed Bach Washery on Carway Deep Mined Coal (332/59/1) Mar 1959D/D PRO/NCB/6/527

Classification of Anthracite and Dry Steam Coals. Part One (331/59/1 & 9) Mar 1959D/D PRO/NCB/6/528

Classification of Anthracite and Dry Steam Coals. Part Two (331/59/1 & 9) Mar 1959D/D PRO/NCB/6/529

Graig Merthyr Colliery. Run-of-Mine test on coal from Sargents District (330/59/1) Mar 1959D/D PRO/NCB/6/530

Bryn Morgan Opencast Site. 4 Ft Seam. Pit No. 15, Borehole 291 (329/59/9 O.C.) Mar 1959D/D PRO/NCB/6/531

Report on Trial of Tower Peas on a Gravity Feed Boiler (328/59/A) Mar 1959D/D PRO/NCB/6/532

Bryn Morgan Opencast Site. 4 Ft Seam. Pit No. 14, Borehole 289 (327/59/9/O.C.) Mar 1959D/D PRO/NCB/6/533

Testing of Anthracite Nuts in an Improved Open Fire (326/59/A) Feb 1959D/D PRO/NCB/6/534

Testing of Domestic Coals. A preliminary report on the work carried out on certain South Eastern Division housecoals (325/59/A) Feb 1959D/D PRO/NCB/6/535

The Chappée Continuous Burning Heating Stove (324/59/A) Feb 1959D/D PRO/NCB/6/536

Graig Merthyr Large - Breaker Test (323/59/1) Feb 1959D/D PRO/NCB/6/537

Breaking of Anthracite Large, Wernos Central Washery (322/59/9) Feb 1959D/D PRO/NCB/6/538a-b

Coronation Park Opencast Site. Middle Vein. Bore Hole 229 (321/59/9 O.C.) Feb 1959D/D PRO/NCB/6/539

Tests to determine the possible degradation of Cross Hands Coals due to the Underground Transport System (320/58/1) Feb 1959D/D PRO/NCB/6/540

Scraper Conveyors. The effect of Scraper Conveyors on Run-Of-Mine coal - increase of duff content (336/59/1) Mar 1959D/D PRO/NCB/6/541

Seam Analysis Seven Sisters Colliery. Cornish Four Feet District. Seam exposed in Roof-up in R.H. Side of Y Gate Road (320/59/9) Feb 1959D/D PRO/NCB/6/542

Annual Report - 1958 (319/59/1&9) Jan 1959D/D PRO/NCB/6/543

Onllwyn No. 1 Colliery. Cornish Four Feet Seam. Size yields of Run of Mine Coal produced before and after introduction of Pulsed Infused Blasting (318/59/9) Jan 1959D/D PRO/NCB/6/544

Gwaun Ton Opencast Site. Seam Analysis from Core Drillings. Soap vein, Stwrin Vein, White 4Ft. Vein, Upper Black Vein (316/59/9/O.C.) Jan 1959D/D PRO/NCB/6/545

Gurnos Opencast Site. Upper Black Seam. Boreholes - 340 and 346 (315/59/9/O.C.) Jan 1959D/D PRO/NCB/6/546

Testing of Domestic Coal. Preliminary Report on the performance of Elliot Large (314/59/A) Jan 1959D/D PRO/NCB/6/547

Yields of Duff in Anthracite Pits. (313/9/1) Jan 1959D/D PRO/NCB/6/548

Mountain Colliery. Run-OfMine test on coal from G Conveyors (South District) (312/59/1) Jan 1959D/D PRO/NCB/6/549

East Pit - Middle Vein (311/58/9) Dec 1958D/D PRO/NCB/6/550

Mountain Colliery. Comparison of yields with the Disc and Ploughing methods of Coal Winning (310/58/1) Dec 1959D/D PRO/NCB/6/551

Testing of Domestic Coal (Maesteg Housecoal) (309/58/A) Nov 1958D/D PRO/NCB/6/552

Breaker Test - Wernos Large. Preliminary Report (308/58/9) Nov 1958D/D PRO/NCB/6/553

Suitability of Onllwyn Grains for use on a Gravity Feed Boiler (411/59/A) Sep 1959D/D PRO/NCB/6/554

Abernant Colliery - Peacock Seam (410/59/9) Sep 1959D/D PRO/NCB/6/555a-b

Opencast Trial Pit at Trenache (409/59/1/O/C) Sep 1959D/D PRO/NCB/6/556

Suitability of Brynlliw Grains for use in Gravity Feed Boilers (408/59/A) Sep 1959D/D PRO/NCB/6/557

Hendy Merthyr Colliery. Run-of-Mine Test (406/59/1) Sep 1959D/D PRO/NCB/6/558

Report on Performance of Rouen Ovoids in Domestic Appliances (405/59/A) Sep 1959D/D PRO/NCB/6/559

Performance tests in a Small Domestic Boiler on Abergoki Washed Small Nuts (404/59/A) Sep 1959D/D PRO/NCB/6/560

Opencast Trial Pit at Hafren (403/59/1/O/C) Sep 1959D/D PRO/NCB/6/561

Opencast Trial Pit at Coedmawr (402/59/1/O/C) Sep 1959D/D PRO/NCB/6/562

Opencast Trial Pit at Grey Valley (401/59/1/O/C) Sep 1959D/D PRO/NCB/6/563

Opencast Trial Pit. Box District (400/59/1/O/C) Sep 1959D/D PRO/NCB/6/564

Report on Visit to Guernsey. August 24th to August 29th 1959 (399/59/1 & 9) Sep 1959D/D PRO/NCB/6/565

Brynlliw Project. Volatile Matter of Six Ft. Seam (398/59/1) Aug 1959D/D PRO/NCB/6/566

Mountain Colliery. Swansea 6' Seam (397/59/1) Oct 1959D/D PRO/NCB/6/567

Brynlliw Colliery. Swansea 6 Ft Seam (396/59/1) Sep 1959D/D PRO/NCB/6/568

Garngoch 3 Colliery. Swansea 3', 5', and 6' Seams (394/59/1) Aug 1959D/D PRO/NCB/6/569

Opencast Trial Pit at Tyn-Y-Cwm (395/59/1/O/C) Aug 1959D/D PRO/NCB/6/570

Result of Trials on a Large Gravity Feed Boiler (393/59/A)D/D PRO/NCB/6/571

An Investigation into the Effect of Size on the Radiation Characteristics of a Housecoal When Burned in a Stool Bottom Grate (392/59/A)D/D PRO/NCB/6/572

Graig Merthyr Colliery. Swansea 3 Ft. and 6 Ft. Seams (391/59/1)D/D PRO/NCB/6/573

Plan showing collieries in the Loughor, Gorseinon, Penllergaer area, annotated with the chemical compounds found within the coal at particular sites. n.d. {1 plan}D/D PRO/NCB/6/574

Seam Analyses, Opencast Trial Pits 8 & 9. Gwaun Ton Site. Soap and Stwrin Veins (390/59/9OC) Aug 1959D/D PRO/NCB/6/575

Pentremawr Colliery. Big Vein, Gras and Pumpquart Seams (389/59/1) Aug 1959D/D PRO/NCB/6/576

Testing of Domestic Coals. Report on the performance of Cwm Cobbles in a Stool Bottom Grate (388/59/A) Jul 1959D/D PRO/NCB/6/577

Seam Analysis. Cwmgrach Colliery Cornish Four Feet Seam (Supposed) (386/59/9) Jul 1959D/D PRO/NCB/6/578

Results of scientific tests in connection with trial of washery performance at Cwmgrach Washery (387/59/9) Jul 1959D/D PRO/NCB/6/578a

Globe Inn Opencast Site. Unidentified Seam. Pit No. 7 - Borehole 213, Pit No. 8 - Borehole 166 (385/59/9 O.C) Jul 1959D/D PRO/NCB/6/579

Opencast Working at Rhosamman Site. Lower Vein Seam, Borehole No. 474 (Core Hole of 428) (384/59/9 O.C) Jul 1959D/D PRO/NCB/6/580

Suitability of Cynheidre Grains, G.C.G. Grains and a mixture of Cwmmgorse Peas and Grains for use in Gravity Feed Boilers (383/59/A) Jul 1959D/D PRO/NCB/6/581

Solid Fuel v. Oil Firing (382/59/A). Annotated in handwriting 'Revised 15/7/59D/D PRO/NCB/6/582

Solid Fuel v. Oil Firing (382/59/A). Annotated in handwriting 'Revised 15/7/59'D/D PRO/NCB/6/582a

Graig Merthyr Colliery. Run-of-Mine test on coal from Sargent's District. Won by means of the second Joy-Sullivan Continuous Miner (381/59/1) Jul 1959D/D PRO/NCB/6/583

Pentremawr Colliery. Overhaul of Blasting Practice (380/59/1) Jun 1959D/D PRO/NCB/6/584

Abercrave Colliery Middle Vein. Size yields of Run-Of-Mine coal produced before and after introduction of Machine Undercutting (379/59/9)D/D PRO/NCB/6/585

Pentre Mawr Colliery. Investigation of the effect of different methods of coal winning on the yield of sized products. Gras Vein (378/59/1) Jun 1959D/D PRO/NCB/6/586

Suitability of Gloda Grains for Gravity Feed Appliances (377/59/A)D/D PRO/NCB/6/587

Tests on coals supplied for demonstration purposes, London, June 1959 (376/59/A) Jun 1959D/D PRO/NCB/6/588

Felinfran Colliery. Graigola Seam (375/59/1) Jun 1959D/D PRO/NCB/6/589

Mountain Colliery (374/59/1). Annotated in ink '(Screening Results)'D/D PRO/NCB/6/590

Globe Inn Opencast Site. Unidentified Seam. Pit No.5 Bore Hole 193 (373/59/9/O.C.)D/D PRO/NCB/6/591

Tar Content of Graig Merthyr Grains (372/59/1)D/D PRO/NCB/6/592

Clydach Merthyr Colliery. Swansea 4' Seam (371/59/1) Jun 1959D/D PRO/NCB/6/593

Further tests on the Watts 80W Gravity Feed Boiler (370/59/A) Jun 1959D/D PRO/NCB/6/594

Testing of Domestic Coals. Radiation tests performed in the Stool Bottom Grate on National 9 Ft Cobbles (369/59/A)D/D PRO/NCB/6/595

Performance tests on Cardiff Dowlais, National, Tower and Aberdare Valley Nuts (368/59/A) Jun 1959D/D PRO/NCB/6/596

Suitability of Tower and Aberdare Valley products for gravity feed boilers (367/59/A)D/D PRO/NCB/6/597

Globe Inn Opencast Site. Unidentified Seam, Pit No. 6, Bore Hole 184 (365/59/9 O.C)D/D PRO/NCB/6/597a

Mountain Colliery (364/59/1). Annotated by hand '% Duff going to Washery'. May 1959D/D PRO/NCB/6/598

Cynheidre Colliery. Coal at Dump (363/59/1) May 1959D/D PRO/NCB/6/599

Gwaun Ton Opencast Site. Seam Analyses from Core Drillings. Soap Vein, White Four Feet Vein. Stwrin Vein, Upper Black Vein (362/59/9. O.C.) May 1959D/D PRO/NCB/6/600

Pentreclwydau Colliery. Cornish Four Feet Seam (361/59/9)D/D PRO/NCB/6/601

Classification of Anthracite. Part Three (360/59/1 & 9) May 1959D/D PRO/NCB/6/602a-b

Seam Analysis, Yniscedwyn Colliery - White 4 Ft. Seam (359/59/9) May 1959D/D PRO/NCB/6/603

The effect of abnormal draught conditions on fuel performance in gravity feed boilers (463/60/A) Jan 1960D/D PRO/NCB/6/604

Organisation of Domestic Fuel Testing Station (462/60/A) Jan 1960D/D PRO/NCB/6/605

Opencast Working at Pantmawr Site. Middle Vein. Pit No. 4 - Bore Hole 418, Trial Pit - Rip Sample (461/60/9. O. C.) Jan 1960D/D PRO/NCB/6/606

Graig Merthyr Culm to Brynlliw (460/60/1) Jan 1960D/D PRO/NCB/6/607

Cwmgorse Colliery - Red Vein - "S2" Face. Gas Ignition (459/60/9) Jan 1960D/D PRO/NCB/6/608

Cefn Coed Colliery. Utilisation of Drained Firedamp (458/60/9) Jan 1960D/D PRO/NCB/6/609

Opencast Working at Pantmawr Site. Unidentified Seam. Pit No. 2 - Bore Hole 340 (457/60/9 O.C.) Jan 1960D/D PRO/NCB/6/610

Abernant Colliery - Unidentified Seam (456/60/9) Jan 1960D/D PRO/NCB/6/611

Performance of "Heatrite" ovoids (455/60/A) Jan 1960D/D PRO/NCB/6/612

Opencast Core Drilling Samples, East Cellwyn Site, Borehole No. 252, Unknown Seam Borehole No. 252, Bluers Seam (454/60/9 O.C) Jan 1960D/D PRO/NCB/6/612a

Gould Farm, Crynant, Opencast Site. Ynisarwed or No. 2 Rhondda Seam Trial Pit - Rip Sample (435/60/9.O.C.) Jan 1960D/D PRO/NCB/6/613

Aberpergwm Colliery. Cornish Four Feet Seam. Suspected Heating (452/59/9) Dec 1959D/D PRO/NCB/6/614

Yniscedwyn Colliery. Investigation of the effect of a Lobbe Hobel Plough on the yield of sized products (451/59/9) Dec 1959D/D PRO/NCB/6/615

Washability test at Coed Bach Washery on Ponthenry Opencast Coal (450/59/1/O/C) Dec 1959D/D PRO/NCB/6/616

Brynlliw Products (449/59/1) Dec 1959D/D PRO/NCB/6/617

Report on the performance of Western 5 feet in a Stool Bottom Grate (448/59/A) Dec 1959D/D PRO/NCB/6/618

Wernos Colliery - Stanllyd Seam (447/59/9) Dec 1959D/D PRO/NCB/6/619

Opencast Working At Ddol Gam Site. Little Brass Seam. Bore Hole 322 (Open Hole 321) (446/59/9 O.C) Dec 1959D/D PRO/NCB/6/620

Gwaun Ton {Erased} Abercrave Opencast Site - Soap Vein. Borehole No.531 Pit No. 6 (445/59/9 O.C) Nov 1959D/D PRO/NCB/6/621

GROUP 1, AREA 1. Screening Analysis of "Gummings" (444/59/1) Nov 1959D/D PRO/NCB/6/622

Opencast Working at Coronation Park. Little Brass and Middle Vein Seams. Bore Holes 232 (Open Hole 115) (443/59/9 O.C.)D/D PRO/NCB/6/623

Solid Fuel versus Oil Firing (442/59/A) Nov 1959D/D PRO/NCB/6/624

Gwaun Ton Opencast Site - Stwrin Seam Pit No.11 Trial Pit - Rip Sample (441/59/9 O.C) Nov 1959D/D PRO/NCB/6/625

Opencast Working at Ddol Gam Site. Lower Vein Seam Bore Hole 250 (Open Hole 117) (440/59/9 O.C) Nov 1959D/D PRO/NCB/6/626

Run-of-Mine test on Cross Hands Coal 27.10.59 and a comparison of the results with those obtained on the 28.1.59 (439/59/1) Nov 1959D/D PRO/NCB/6/627

Pentremawr Colliery. Investigation of the effect of different methods of coal winning on the yield of sized products. Pulsed Infusion compared with Machine Cutting (438/59/1) Nov 1959D/D PRO/NCB/6/628

Investigation into the possible usage of Hendy Merthyr Small Products (437/59/A) Nov 1959D/D PRO/NCB/6/629

Suitability of C.R.E. Pellet Briquettes made from Onllwyn Duff for Gravity Feed Boilers (436/59/A) Nov 1959D/D PRO/NCB/6/630

Garngoch No.3 Colliery. Swansea 6Ft. Seam (435/59/1) Nov 1959D/D PRO/NCB/6/631

Cross Hands Colliery. Green Vein Seam (434/59/1) Nov 1959D/D PRO/NCB/6/632

Opencast Working at Coronation Park. Middle and Lower Vein Seams (433/59/9 O.C) Nov 1959D/D PRO/NCB/6/633

Carway Colliery. Ddugaled, Felen and Big Vein Seams (432/59/1) Nov 1959D/D PRO/NCB/6/634

Opencast Working at Ddol Gam Site. Lower Vein Seam, Pit No. 1. Bore Hole 130 (431/59/9 O.C.) Oct 1959D/D PRO/NCB/6/635

Suitability of Penaber (Valley) Grains for use in Gravity Feed Boilers (430/59/A) Oct 1959D/D PRO/NCB/6/636

Effect of increasing the size range of grains on product performance in Small Gravity Feed Boilers (428/58/A) Oct 1959D/D PRO/NCB/6/637a-b

Gwaun Ton Opencast Site. White Four Feet Seam. Trial Pit No. 10 (Borehole 158) (429/59/9/O.C.) Oct 1959D/D PRO/NCB/6/638

Performance of Experimental Ovoids Containing Resin and Starch (427/59/A) Oct 1959D/D PRO/NCB/6/639

Performance of 'Heat-rite' Ovoids (426/59/A) Oct 1959D/D PRO/NCB/6/640

Opencast Trial Pit & Boreholes at Capel Bach (425/59/1/O/C.) Oct 1959D/D PRO/NCB/6/641

Testing of Domestic Coals. Report on the performance of Windsor large housecoal in a Stool Bottom Grate (424/59/A) Oct 1959D/D PRO/NCB/6/642

Gwaun Ton Opencast Site. White Four Feet Seam. Trial Pit No. 7 (Borehole 223) (423/59/9/O.C.) Oct 1959D/D PRO/NCB/6/643

Tirbach Opencast Culm treated at Coed Bach Washery (422/59/1/O.C) Oct 1959D/D PRO/NCB/6/644

Opencast Coal at Ddol Gam Site. Little Brass and Middle Vein Seams (421/59/9.O.C) Oct 1959D/D PRO/NCB/6/645

Pentreclwydau Colliery. Seam Analysis from Core Drilling Peacock Seam (420/59/9) Oct 1959D/D PRO/NCB/6/646

Washability test at Coed Bach Washery on Carway Deep Mined Coal (419/59/1) Oct 1959D/D PRO/NCB/6/647

Notes on Washery Yields Coedbach Washery (418/59/1) Oct 1959D/D PRO/NCB/6/648

Washability Test at Coed Bach Washery on Pentremawr Coal (417/59/1) Oct 1959D/D PRO/NCB/6/649a-b

Washability Test at Coed Bach Washery on Cross Hands Coal (416/59/1) Oct 1959D/D PRO/NCB/6/650

Note on "Kwiklite" patent fuel lighter (415/59/A) Oct 1959D/D PRO/NCB/6/651

Opencast Working at Ddol Gam Site. Little Brass and Middle Vein Seam (414/59/9/OC) Nov 1959D/D PRO/NCB/6/652

Opencast Trial Pit. Coal Brook Additional (413/59/1/O/C) Oct 1959D/D PRO/NCB/6/653

Opencast Working at Pantmawr Site (412/59/9 O.C.) Sep 1959D/D PRO/NCB/6/654

Anthracite Duffs - Group 1 (516/60/1) Jul 1960D/D PRO/NCB/6/655

Graig Merthyr - Small Nuts. The relationship between the ash content and the percentage sink material (515/60/1) Jul 1960D/D PRO/NCB/6/656

Opencast Working at Pantmawr Site. Lower Vein Seam, Core Hole No. 621 (513/60/9.O.C) Jul 1960D/D PRO/NCB/6/657

Opencast working at Pantmawr site, Middle Vein Seam, Core Hole No. 610 (Open Hole 502) (514/60/9 O.C) Jul 1960D/D PRO/NCB/6/657a

Opencast Working at Pantmawr Site. Little Brass Seam. Core Hole No. 514 (Open Hole 504) Core Hole No. 590 (511/60/9.O.C.) Jul 1960D/D PRO/NCB/6/658

Opencast working at Coronation Park Site, Little Brass Seam, Core Hole No. 123 and Core Hole No 229 (512/60/9 O.C) Jul 1960D/D PRO/NCB/6/658a

Opencast Working at Pantmawr Site. Lower Vein Seam. Core Holes 622, 625, and 629 (510/60/9. O.C.) Jun 1960D/D PRO/NCB/6/659

Graig Merthyr. Run-Of-Mine Test (509/60/1) Jun 1960D/D PRO/NCB/6/660

Pantyffynon Colliery. Gras Isaf Seam (508/60/9) Jun 1960D/D PRO/NCB/6/661

Opencast Working at Pantmawr Site. Middle Vein Seam. Trial Pit No. 6, Bore Hole 350 (507/60/9 O.C.) Jun 1960D/D PRO/NCB/6/662

St. Mary's Church, Clydach. Heating Arrangements (506/60/A) Jun 1960D/D PRO/NCB/6/663

Cynheidre Washery. Screening Run-of-Mine to Washery (505/60/1) Jun 1960D/D PRO/NCB/6/664

Gwaun Ton Opencast Site. Trial Pit - Seam Samples. White Four Feet and Soap Veins (504/60/9 O.C.) Jun 1960D/D PRO/NCB/6/665

Brynlliw Washery. Retreatment of Middlings (503/60/1) May 1960D/D PRO/NCB/6/666

A Review of Effluents in the West Wales Rivers Boards' Area. N.C.B. Area 9 (502/60/9) May 1960D/D PRO/NCB/6/667

A Review of Effluents in the West Wales Rivers Boards' Area. N.C.B. Area 1 (501/60/1) May 1960D/D PRO/NCB/6/668

Heating - Pantygwydr Chapel (500/60/A) May 1960D/D PRO/NCB/6/669

Gwaun Ton Opencast Site. Trial Pit - Seam Analysis, Stwrin Seam (499/60/9 O.C) May 1960D/D PRO/NCB/6/670

Analyses of Seam Core Drillings. Maesgwyn Opencast Site, Cornish 4Ft. and 9Ft. Seams. Bryngoleu Opencast Site New Seam. Abercrave Opencast Site, Harnlo and Lower 4Ft. Seams (498/60/9 OC) May 1960D/D PRO/NCB/6/671

Opencast Working at Pantmawr Site. Seams:- Little Brass, Middle Vein, Lower Vein. Core Hole No. 618. Open Hole 617 (497/60/9 O.C.) May 1960D/D PRO/NCB/6/672

Investigation into the heating arrangements at Jersey Marine Golf Club (496/60/A) May 1960D/D PRO/NCB/6/673

Abernant Colliery - Brynlloi Seam (495/60/9) May 1960D/D PRO/NCB/6/674

Opencast Working at Pantmawr Site. Seams:- Lower Vein, Little Brass, Middle Vein. Core Hole 61 (Open Hole 615) (494/60/9 O.C.) May 1960D/D PRO/NCB/6/675

Survey of Swansea Corporation Coal Burning Appliances. Part 2 (493/60/A) May 1960D/D PRO/NCB/6/676

Brynlliw Washery. Washability Test of Garngoch 3 Culm (492/60/1) May 1960D/D PRO/NCB/6/677

Opencast Working at Gwaun Ton Site. Trial Pit No. 12, Bore Hole 234 (491/60/9 O.C) May 1960D/D PRO/NCB/6/678

Culms for Lime Burning (490/60/1 & 9) May 1960D/D PRO/NCB/6/679

Performance of Tirbach and a mixture of Pentremawr and Tirbach coals washed at Coedbach Washery (489/60/A) Apr 1960D/D PRO/NCB/6/680

Survey of Swansea Corporation Coal Burning Appliances. Part 1 (488/60/1) Apr 1960D/D PRO/NCB/6/681

Opencast Working at Pantmawr Site Lower Vein. Trial Pit No. 5, Bore Hole 343 (487/60/9 O.C) Apr 1960D/D PRO/NCB/6/682

Brynlliw Washery. Washability test of Graig Merthyr Culm (486/60/1) Apr 1960D/D PRO/NCB/6/683

Cross Hands Colliery. Survey of Gas from Green Vein - G3 Conveyor (485/60/1) Apr 1960D/D PRO/NCB/6/684

Performance of C.R.E. pellet briquettes made from Pentremawr anthracite (484/60/A) Apr 1960D/D PRO/NCB/6/685

Cynheidre Washery - 3rd Report (483/60/1) Apr 1960D/D PRO/NCB/6/686

Civil Defence. Suitability of underground waters for drinking purposes (482/60/1) Apr 1960D/D PRO/NCB/6/687

Performance of Ponthenry (Pumpquart Seam) coal washed at Coed Bach Washery in a small Gravity Feed Boiler (481/60/A) Mar 1960D/D PRO/NCB/6/688

Cynheidre Washery - 2nd Report (480/60/1) Mar 1960D/D PRO/NCB/6/689

Opencast Working at Pantmawr Site. Seams:- Little Brass, Middle Vein, Lower Vein. Bore Hole 588 (Open Hole 551), Bore Hole 2 (Open Hole 565) (479/60/9 O.C) Mar 1960D/D PRO/NCB/6/690

Observations on the performance of broken Phurnacite in a Small Gravity Feed Boiler (478/60/A) Mar 1960D/D PRO/NCB/6/691

Performance of St John's 7Ft. Seam large coal in the Stool Bottom Grate (477/60/A) Mar 1960D/D PRO/NCB/6/692

Pantyffynnon Colliery. Unidentified and Middle Pumpquart Seams (476/60/9) Mar 1960D/D PRO/NCB/6/693

Opencast Working at Maesgwyn Cap Site. Bore Hole No's 2044 and 2045 (475/60/9 OC) Mar 1960D/D PRO/NCB/6/694

Performance of Brynlliw Grains in Gravity Feed Boilers (474/60/A) Mar 1960D/D PRO/NCB/6/695

Cynheidre Washery (473/60/1) Mar 1960D/D PRO/NCB/6/696

Suitability of Tirbach, Ponthenry and New Blaenhirwaun Grains for S.A.S.S (472/60/A) Mar 1960D/D PRO/NCB/6/697

Brynlliw Colliery - Run-of Mine Test (471/60/1) Mar 1960D/D PRO/NCB/6/698

Opencast Working at Rhos Amman Site. Bryn Seam. Core Hole 375 (Open Hole 349) (470/60/O.C.9) Feb 1960D/D PRO/NCB/6/699

Approval testing of Automatic Gravity Feed Anthracite Boilers for inclusion in the list of approved appliances (468/60/A) Feb 1960D/D PRO/NCB/6/700

Opencast Working at Pantmawr Site. Unidentified Seam. Trial Pit No. 3. Bore Hole 386 (467/60/9. O.C) Feb 1960D/D PRO/NCB/6/701

Performance of C.R.E. Pellet briquettes made from Pentremawr Duff in Gravity Feed Boilers (469/60/A) Feb 1960D/D PRO/NCB/6/702

Opencast Working at Pantmawr Site. Unidentified Seams. Core Sample from Bore Holes Nos. 524, 526 (466/60/9 O.C.) Feb 1960D/D PRO/NCB/6/703

Annual Report 1959 (465/60/1 & 9) Feb 1960D/D PRO/NCB/6/704

Oil v. Solid Fuel Trials at Guernsey. Report No.1 (464/60/1 & 9) Feb 1960D/D PRO/NCB/6/705

Firing of Horticultural Boilers (569/60/A) Nov 1960D/D PRO/NCB/6/706

The Performance of Cynheidre Grains in a Small Gravity Feed Boiler (568/60/A) Nov 1960D/D PRO/NCB/6/707

Brynlliw Colliery. Swansea 6 Ft. Seam (567/60/1) Nov 1960D/D PRO/NCB/6/708

Cynheidre 3 Colliery. Braslyd Seam (566/60/1) Nov 1960D/D PRO/NCB/6/709

Opencast Working at Derwen Site. Charcoal Seam. Core Hole NO.362 (Bore Hole 15/60) (565/60/9 O.C) Oct 1960D/D PRO/NCB/6/710

Abernant Colliery - Unidentified Seam (564/60/9) Oct 1960D/D PRO/NCB/6/711

Washability Test at Cynheidre Washery on Cross Hands Coal, 5th October 1960 (563/60/1) Oct 1960D/D PRO/NCB/6/712

Cynheidre Washery. Screening of Run-of-Mine to Washery (562/60/1) Oct 1960D/D PRO/NCB/6/713

Ventilation Measurements Morlais Colliery. Special Survey - Box District (561/60/1) Oct 1960D/D PRO/NCB/6/714

The Performance of the Beeston (New Senior) Boiler with Earleymill attachment at Steel Company of Wales Research Department, Cwmfelin (560/60/A) Oct 1960D/D PRO/NCB/6/715

Opencast Working At Blaina Site. Harnlo, Stanllyd and Middle Pumpquart Seams. Core Hole No. 459 (Open Hole 458), Core Hole No. 429 (Open Hole 405) (559/60/9 O.C.) Oct 1960D/D PRO/NCB/6/716

Opencast Working at Blaina Site. Harnlo Seam. Core Hole No.419 (558/60/9 O.C) Oct 1960D/D PRO/NCB/6/717

Washability Test at Cynheidre Washery on Cynheidre Coal, 27th September, 1960 (557/60/1) Oct 1960D/D PRO/NCB/6/718

Opencast Working at Derwen Site. Unidentified Seam. Core Hole No.341 (Open Hole 321), Core Hole No.340 (Open Hole 330) (556/60/9 O.C) Oct 1960D/D PRO/NCB/6/719

Cynheidre - River Pollution (555/60/1) Oct 1960D/D PRO/NCB/6/720

Maesgwyn Opencast Coal Site. Exploratory Core Drilling, Analyses of Coal Seams. White Four Feet Seam, Eighteen Feet Seam, Cornish Four Feet Seam, Nine Feet Seam (554/60/9 O.C) Oct 1960D/D PRO/NCB/6/721

Abercrave and Gwaun Ton Opencast Sites. Trial Pits - Seam Analyses. Black Vein - Upper and Lower, Lower Four Feet, Brass Vein (553/60/9 O.C) Oct 1960D/D PRO/NCB/6/722

Opencast Working at Tre Bevan Site. Bryn Vein Seam. Trial Pit No. 1. Bore Hole 10 (552/60/9 O.C.) Oct 1960D/D PRO/NCB/6/723

Performance of "Heatrite" Ovoids (551/60/A) Oct 1960D/D PRO/NCB/6/724

Performances of Area 2 Housecoals in the Stool Bottom Grate (550/60/A) Oct 1960D/D PRO/NCB/6/725

Performance Tests in a small Domestic Boiler on Abergorki, Dowlais Cardiff, National and Lady Windsor Nuts (549/60/A) Oct 1960D/D PRO/NCB/6/726

Morlais Colliery. Swansea 5 Ft. Seam (548/60/1) Sep 1960D/D PRO/NCB/6/727

Garngoch No.3 Colliery. Swansea 3' - E. Conveyor Face (547/60/1) Sep 1960D/D PRO/NCB/6/728

Mountain Colliery. Swansea 6 Ft. Seam - 'S' Face. (546/60/1) Sep 1960D/D PRO/NCB/6/729

Cross Hands Colliery. Big Vein and Green Vein Seams (545/60/1) Sep 1960D/D PRO/NCB/6/730

Graig Merthyr Colliery. Swansea 3 Ft. and 6 Ft. seams (544/60/1) Sep 1960D/D PRO/NCB/6/731

Opencast Working at Forch Egel Site. Duke Seam. Trial Pit No.1 - Bore Hole 37 (543/60/9 O.C) Sep 1960D/D PRO/NCB/6/732

Opencast Working at Blaina Site. Harnlo, Middle Pumpquart and Stanllyd Seams. Core Hole 322 (542/60/9 O.C) Sep 1960D/D PRO/NCB/6/733

Brynlliw Middlings - 19th Aug 1960 (541/60/1) Sep 1960D/D PRO/NCB/6/734

Opencast Working at Banc Bryn Site. Unidentified Seam. Core Hole No. 383 (Open Hole 370) (540/60/9 O.C.) Sep 1960D/D PRO/NCB/6/735

Opencast Working at Blaina Site. Harnlo, Stanllyd and Middle Pumpquart Seams. Core Hole No.356 (Open Hole 332) (539/60/9 O.C) Sep 1960D/D PRO/NCB/6/736

Brynlliw Colliery. Run-Of-Mine Test on Coal from Q Face Won by means of the Joy-Sullivan Continuous Miner. Seam - Swansea Six Feet. Date of Test - 30th Aug 1960 (538/60/1) Sep 1960D/D PRO/NCB/6/737

Opencast Working at Blaina Site. Harnlo and Stanllyd Seams. Core Hole No.386 (Open Hole 372) (537/60/9 O.C) Sep 1960D/D PRO/NCB/6/738

Opencast Working at the Bevan Site. Bryn Vein Seam. Core Hole No.11 (Open Hole 10) (536/60/9 O.C) Sep 1960D/D PRO/NCB/6/739

Ammanford Colliery. Investigation of the effect of Ordinary Shot-firing as opposed to High Pressure Cardox Blasting on the yield of sized products (535/60/9) Sep 1960D/D PRO/NCB/6/740

Opencast Working at Banc Bryn Site. Unidentified Seam. Core Hole No. 243 (open hole 235), Core Hole No. 353 (open hole 352), Core Hole No. 330 (Open Hole 318). 534/60/9.OC.) Sep 1960D/D PRO/NCB/6/741

Opencast Working at Blaina Site. Harnlo, Stanllyd and Middle Pumpquart Core Hole No. 321 (Open Hole 316) (533/60/9.OC.) Sep 1960D/D PRO/NCB/6/742

Treatment of Mountain Large at Brynlliw Coal Preparation Plant (532/60/1) Aug 1960D/D PRO/NCB/6/743

The Performance of the grains produced at Coed Bach Washery in a Small Gravity Feed Boiler (531/60/A) Aug 1960D/D PRO/NCB/6/744

Maesgwyn O/C. Site. Core Drillings. B.Hs 2091, 2209 AND 2233. Cornish Four Feet and Nine Feet Seams (530/60/9/O/C) Aug 1960D/D PRO/NCB/6/745

Bryngoleu O/C. Site. Core Drilling - B.Hs 349 and 359. New and Cnnafiog Seams. (529/60/9/O/C) Aug 1960D/D PRO/NCB/6/746

Abercrave O/C. Site. Core Drilling. Brass Vein. B.H. 640 (528/60/9O/C) Aug 1960D/D PRO/NCB/6/747

The Performance of Great Mountain and New Blaenhirwaun grains in a Small Gravity Feed Boiler (527/60/1) Aug 1960D/D PRO/NCB/6/748

The Performance of a blend of Grains and Rice in a Small Gravity Feed Boiler (526/60/A) Aug 1960D/D PRO/NCB/6/749

Washability Test at Cynheidre Washery on Great Mountain Coal (525/60/1) Aug 1960D/D PRO/NCB/6/750

Washability Test at Cynheidre Washery on Blaenhirwaun Coal (524/60/1) Aug 1960D/D PRO/NCB/6/751

Organisation of Domestic Fuel Testing Station (523/60/A) Aug 1960D/D PRO/NCB/6/752

Cynheidre Washery. W. Duff (522/60/1) Jul 1960D/D PRO/NCB/6/753

Cynheidre Washery. Pegson Breaker Tests (521/60/1) Jul 1960D/D PRO/NCB/6/754

Notes on the Visit to Watts Boilers, Lydney (520/60/A) Jul 1960D/D PRO/NCB/6/755

Anthracite Duffs - Group 1 (519/60/1) Jul 1960D/D PRO/NCB/6/756

Opencast working at Pantmawr site, Lower Vein, Core Hole No. 627 (518/60/9 O.C) Jul 1960D/D PRO/NCB/6/756a

Opencast Working at Pantmawr Site. Little Brass. Middle Vein. Core Hole No. 612 (Open Hole 611) (517/60/9 O.C) Jul 1960D/D PRO/NCB/6/757

Performance of Abernant Grains in a Small Gravity Feed Boiler (621/61/A) May 1961D/D PRO/NCB/6/758

Performance Tests in a Small Domestic Boiler on Phurnacite and Heatrite Products (620/61/A) May 1961D/D PRO/NCB/6/759

Report on New Anthracite Product for Gravity Feed Boilers. Part Two (619/61/1) May 1961D/D PRO/NCB/6/760

Performance of Abernant Grains in a small Gravity Feed Boiler (618/61/A) May 1961D/D PRO/NCB/6/761

Comparison of the Performance of Dry Small Grain and the Normal Grain Product Produced at Cynheidre (617/61/A) Apr 1961D/D PRO/NCB/6/762

Test Report on the Torglow 1xB Openable Stove (616/61/A) Annotated in handwriting Confidential. Apr 1961D/D PRO/NCB/6/763

Boiler Trials at Cefn Coed Colliery, 6-10th April 1961 (615/61/9) Apr 1961D/D PRO/NCB/6/764

Yniscedwyn Colliery - Unidentified Seams. Face of X1 Gate Road, Face of X1 Supply Road (614/61/9) Apr 1961D/D PRO/NCB/6/765

Report on the Six-hour Test Carried out on No. 3 Boiler at Abernant Boiler House, using Cwmgorse Washed Duff (613/61/9) Mar 1961D/D PRO/NCB/6/766

Confidential Test Report On The Ardex Heating Stove (612/61/A) Mar 1961D/D PRO/NCB/6/767

The Performance of Avenue Coke in Gravity Feed Boilers (611/61/A) Mar 1961D/D PRO/NCB/6/768

Cynheidre Washery. Ash Content of Froth Floated Fines from Individual Cells (610/61/1) Mar 1961D/D PRO/NCB/6/769

Report on Mild Heat Treated Ovoids (609/61/A) Mar 1961D/D PRO/NCB/6/770

Thermal Drying of Cynheidre Buckwheat at Simon-Carves Ltd., Cheadle Heath, Stockport, Cheshire on 7-8/3/61 (608/61/1) Mar 1961D/D PRO/NCB/6/771a-b

The Performance of Fernhill Coal in a Small Gravity Feed Boiler (607/61/A) Mar 1961D/D PRO/NCB/6/772

Test Report on Senora No.2 Openable Stove without boiler (606/61/A) Mar 1961D/D PRO/NCB/6/773

The performance of Onllwyn Opencast, Onllwyn No.1, Pwllbach, Onllwyn No.3 and Seven Sisters grains in the Gravity Feed Boiler (605/61/A) Mar 1961D/D PRO/NCB/6/774

Brynlliw Washery. Results obtained when washing coal of +1/16 size in a Daniel Separator (604/61/1) Feb 1961D/D PRO/NCB/6/775

The performance of Avenue Coke in a Small Gravity Feed Boiler (603/61/A) Feb 1961D/D PRO/NCB/6/776

Report on New Anthracite Product for Gravity Feed Boilers. Part 1 (602/61/1) Feb 1961D/D PRO/NCB/6/777

Comparison of Fuel Costs for Heating of Royal Oak Hotel, Llanedi (601/61/A) Feb 1961D/D PRO/NCB/6/778

An investigation into the effect of change in volatile content of Phurnacite on product performance (600/61/A) Feb 1961D/D PRO/NCB/6/779

Annual Report 1960 (599/61/1 & 9) Feb 1961D/D PRO/NCB/6/780

Cynheidre Washery. Run-Of-Mine Test on Coal from Cynheidre ½ Date of Test 18th January 1961 (598/61/1) Feb 1961D/D PRO/NCB/6/781

Graig Merthyr Washery (597/61/1) Feb 1961D/D PRO/NCB/6/782

Notes on the Performance of C.R.E. Ovoids in a small natural-draught Gravity Feed Boiler (596/61/A) Jan 1961D/D PRO/NCB/6/783

Onllwyn Central Washery Feed to Baum Washer (595/61/9) Jan 1961D/D PRO/NCB/6/784

Cynheidre Washery. Yields and Ash Contents of Middlings Produced from No.1 Cone at Cynheidre Washery (594/61/1) Jan 1961D/D PRO/NCB/6/785

The performance of Cefn Coed Grains in Small Gravity Feed Boiler (593/61/A) Jan 1961D/D PRO/NCB/6/786

Morlais Colliery. Swansea 5 Ft. Seam, B4 Conveyor (592/61/1) Jan 1961D/D PRO/NCB/6/787

Morlais Colliery. Llangadog District - Swansea 5 Ft Seam. In Working Face on Deep of Main Heading (591/61/1) Jan 1961D/D PRO/NCB/6/788

Investigation into the Heating Standards at Area Finance Offices, Exchange Buildings, Swansea (590/60/A) Dec 1960D/D PRO/NCB/6/789

The Performance of Gloda Grains in Gravity Feed Boilers within the Output range 125,000 to 500,000 B.T.U./hr (589/60/A) Dec 1960D/D PRO/NCB/6/790

Opencast Working at Cae Helyg Site. Upper Triquart, and Charcoal Seams (588/60/9 O.C.) Dec 1960D/D PRO/NCB/6/791

Opencast Working at Cae Helyg Site. Upper Triquart, Middle Pumpquart and Charcoal Seams. Core Hole Nos. 175 and 195 (587/60/9 O.C.) Dec 1960D/D PRO/NCB/6/792a-b

Performance of Garnant Grains in a small Gravity Feed Boiler (586/60/A) Dec 1960D/D PRO/NCB/6/793

The Performance of Onllwyn Grains in a Small Gravity Feed Boiler (585/60/A) Dec 1960D/D PRO/NCB/6/794

Bryngoleu Opencast Site. Greys Seam, Rip Sample. Bore Hole No.319 - Pit No. 2 (584/60/9 O.C) Dec 1960D/D PRO/NCB/6/795

Abercrave Opencast Site. Stwrin, Upper Leaf of Black Vein and White Four Foot Seams. Core Drilling, Borehole No.508 (583/60/9 O.C). Dec 1960D/D PRO/NCB/6/796

Trials on Watts 500A Gravity Feed Boiler, Oystermouth School (582/60/A) Nov 1960D/D PRO/NCB/6/797

Opencast Working at Cae Helyg Site. Unidentified Seam, Core Hole Nos 164 173 (581/60/9 O.C) Nov 1960D/D PRO/NCB/6/798

The Performance of Gloda Grains in a Small Gravity Feed Boiler (580/60/A) Nov 1960D/D PRO/NCB/6/799

Run-Of-Mine Test on the Big Vein Seam from Great Mountain No. 1 (579/60/1) Nov 1960D/D PRO/NCB/6/800

Run-Of-Mine Test on the Big Vein Seam from Great Mountain No. 2 (578/60/1) Nov 1960D/D PRO/NCB/6/801

Bryngoleu and Gwaunton Opencast Sites. Rip and Core Drilling Samples (577/60/9 O.C.) Nov 1960D/D PRO/NCB/6/802

Opencast Drilling at St. Davids Site, Penllergaer, Swansea 4 Seam (576/60/1 O.C) Nov 1960D/D PRO/NCB/6/803

Opencast Trial Pit at Llewyntew, No. 2 Rhondda Seam (575/60/1 O.C) Nov 1960D/D PRO/NCB/6/804

Brynlliw Washery - An Examination of the R.O.M. and the Culm after the Bradford Breaker (574/60/1) Nov 1960D/D PRO/NCB/6/805

Opencast Working at Cae Helyg Site. Unidentified Seam. Core Hole No.151 (Open Hole 126) (573/60/9 O.C.) Nov 1960D/D PRO/NCB/6/806

Opencast Working at Blaina Site. Harnlo and Stanllyd Seams, Core Hole No. 463 (572/60/9 O.C) Nov 1960D/D PRO/NCB/6/807

Washability Test at Brynlliw Washery on Garngoch III Culm 5 x 2 (571/60/1) Nov 1960D/D PRO/NCB/6/808

Washability Test at Coed Bach Washery on Pentremawr Coal, 5th October 1960 (570/60/1) Nov 1960D/D PRO/NCB/6/809

Comparative Smoke Tests Using Binderless Char Briquettes (673/62/A3) Jan 1962D/D PRO/NCB/6/810a-b

Classification of Anthracite Grains According to Performance in a Gravity Feed Boiler (672/62/A2) Jan 1962D/D PRO/NCB/6/811

Abernant Colliery. Concrete Cores (671/62/9) Jan 1962D/D PRO/NCB/6/812

Onllwyn Central Washery. Rhos Opencast Culm to Washery. Date of Test 7th November, 1961 (670/62/9) Jan 1962D/D PRO/NCB/6/813

The performance of Duffryn Rhondda 4 Ft. Seam Coal in Domestic Appliances (669/62/A1) Jan 1962D/D PRO/NCB/6/814

Confidential Test Report On The Aga 45a Gravity Feed Boiler (668/61/A) Dec 1961D/D PRO/NCB/6/815

Washability Test at Coed Bach Washery on Pentremawr Coal, 29th November 1961 (667/61/1) Dec 1961D/D PRO/NCB/6/816

A Report on the Performances of Dai 3 and Dai 4 Ovoids in Domestic Appliances (666/61/A) Dec 1961D/D PRO/NCB/6/817

Mountain Colliery. Swansea 3 Ft. and 6 Ft. Seam (665/61/1) Nov 1961D/D PRO/NCB/6/818

An Evaluation of Crown Cobbles as a Domestic Coal (664/61/A) Nov 1961D/D PRO/NCB/6/819

Brynlliw Culm to Washery. Sampled 25th October 1961 (663/61/1) Nov 1961D/D PRO/NCB/6/820

Performance of Two Wagon Samples of Banwen Opencast Grains in a Small Gravity Feed Boiler (662/61/A) Nov 1961D/D PRO/NCB/6/821

The Bonallack Pneumarotor (661/61/1) Nov 1961D/D PRO/NCB/6/822

Seam Analyses. Abernant Colliery, Peacock Seam (660/61/9) Nov 1961D/D PRO/NCB/6/823

Banwen Washery. Sizing and ash content of culm to Washery (659/61/9) Nov 1961D/D PRO/NCB/6/824

Ammanford Colliery. Investigation of the effect of a B.J.D. Anderton Disc Shearer, on the yield of sized products (658/61/9) Oct 1961D/D PRO/NCB/6/825

Seam Analyses. Seven Sisters Colliery, Unidentified Seam (657/61/9) Oct 1961D/D PRO/NCB/6/826

Performance of a Wagon Sample of Banwen Grains in a Small Gravity Feed Boiler (656/61/A) Oct 1961D/D PRO/NCB/6/827

Performance of Onllwyn Opencast Grains in a Small Gravity Feed Boiler (655/61/A) Oct 1961D/D PRO/NCB/6/828

Report on a Visit to the New Central Wages Offices at Pontardulais (654/61/A) Oct 1961D/D PRO/NCB/6/829

Performance of Cynheidre Grains in a Small Gravity Feed Boiler (653/61/A) Oct 1961D/D PRO/NCB/6/830

Seam Analyses. Yniscedwyn Colliery - White 4 Seam (652/61/9) Oct 1961D/D PRO/NCB/6/831

Boiler Trial on Sunbrite Coke at Brynlliw Colliery (651/61/1) Oct 1961D/D PRO/NCB/6/832

Cynheidre Colliery - Middlings (650/61/1) Oct 1961D/D PRO/NCB/6/833

Prevention of River Pollution (649/61/1 & 9) Sep 1961D/D PRO/NCB/6/834

The performance of Onllwyn Opencast coal in Small Gravity Feed Boilers (648/61/A) Sep 1961D/D PRO/NCB/6/835

Drying of Cynheidre Filter Cake in a Fluidised Bed (Pilot Plant) Dryer (647/61/1) Sep 1961D/D PRO/NCB/6/836

Brynlliw Colliery. Swansea 6 Ft. Seam (646/61/1) Sep 1961D/D PRO/NCB/6/837

Smoke Emission from Domestic Fuels (645/61/A) Sep 1961D/D PRO/NCB/6/838

Float and Sink Tests - Anthracite Duffs (644/61/9) Sep 1961D/D PRO/NCB/6/839

Morlais Colliery - Llangadog Coal (643/61/1) Sep 1961D/D PRO/NCB/6/840

Extracts from The Degradation of R.O.M. Coal on its way from the Face to the Washery by E. Brocke. From: Gluckauf, 96, No. 22, 22.10. 1960, pp. 1418-1432. Translated by R. Gwynne Morris, Area Coal Preparation Engineer, Area No. 9 (642/61/1 & 9) Sep 1961D/D PRO/NCB/6/841

CONFIDENTIAL Test report on the Pithers Studio Stove without boiler (640/61/A) Aug 1961D/D PRO/NCB/6/842

Seven Sisters Colliery. Seam sections:- Black Vein and B. I. Supply Road (639/61/9) Aug 1961D/D PRO/NCB/6/843

Pneumatic Conveying of Coal (638/61/1) Aug 1961D/D PRO/NCB/6/844

Brynlliw Washery. Sizing of Culm to Washery (637/61/1) Aug 1961D/D PRO/NCB/6/845

Brynnlliw Colliery. An Investigation into the Yield of Duff (636/61/1)D/D PRO/NCB/6/846

Performance of the Beeston Robin Hood Sectional Boiler with Earleymill gravity feed attachment (635/61/A) Aug 1961D/D PRO/NCB/6/847

Performance of Ogilvie Small Nuts in a Small Domestic Boiler (634/61/A) Aug 1961D/D PRO/NCB/6/848

Investigation into the Performance of an Experimental Back Boiler (633/61/A) Aug 1961D/D PRO/NCB/6/849

Performance of a Mixed Grain Product Washed at Abernant (632/61/A) Jul 1961D/D PRO/NCB/6/850

Brynlliw Colliery. Comparison of Yields with the Joy Continuous Miner, Joy Loader and Anbau Hobel Plough (631/61/1) Jul 1961D/D PRO/NCB/6/851

Performance of Abernant Grains in a Small Gravity Feed Boiler (630/61/A) Jul 1961D/D PRO/NCB/6/852

Pwllbach Colliery. Investigation of the effect of a B.J.D. Aberton Disc Shearer, on the Yield of sized products (629/61/9) Jul 1961D/D PRO/NCB/6/853

Summary of Control Tests on Drigrains for Eight Weeks Ending June 24th 1961 (628/61/1) Jul 1961D/D PRO/NCB/6/854

The Performance of Fernhill Grains in a Small Gravity Feed Boiler (627/61/A) Jun 1961D/D PRO/NCB/6/855

Performance of Abernant Grains in a Small Gravity Feed Boiler (626/61/A) Jun 1961D/D PRO/NCB/6/856

An Investigation into the Performance of Duffryn Rhondda Nuts in a small domestic boiler (625/61/A) Jun 1961D/D PRO/NCB/6/857

CONFIDENTIAL Test Report on the Pithers No.4 size Unique model Stove with Boiler (624/61/A) Jun 1961D/D PRO/NCB/6/858

Coed Bach Washery. Screening of Grains on 3.5 and 4.0mm Wedge Wire Screens (623/61/1) Jun 1961D/D PRO/NCB/6/859

CONFIDENTIAL Test Report on the Pithers No.2 Unique Stove (622/61/A) May 1961D/D PRO/NCB/6/860

Comparison of the Performance of Natural and Manufactured Fuels in Domestic Appliances: Part 3 - Smoke Emission (725/62/A29) Jul 1962D/D PRO/NCB/6/861

The Performance of a mixture of Dillwyn and Blaenant grains in a Small Gravity Feed Boiler (7244/62/A28) Jul 1962D/D PRO/NCB/6/862

Abernant - Prevention of River Pollution (723/62/1) Jul 1962D/D PRO/NCB/6/863

Comparison of the Performance of Natural and Manufactured Fuels in Domestic Appliances: Part 2 - Performance Index (722/62/A27) Jun 1962D/D PRO/NCB/6/864

Board Loads at Loughor (721/62/1) Jun 1962D/D PRO/NCB/6/865

Seam Analysis. Wernos Colliery - Rock Vein (720/62/9) Jun 1962D/D PRO/NCB/6/866

CONFIDENTIAL Approval of the Janitor Junior Gravity Feed Boiler (Mark 2) (719/62/A26) Jun 1962D/D PRO/NCB/6/867

Thyssen Drier (718/62/1) Jun 1962D/D PRO/NCB/6/868

The Performance of Anthracite Pellets in Gravity Feed Boilers (717/62/A25) Jun 1962D/D PRO/NCB/6/869

The suitability of Wernos Grains for Small Gravity Feed Boilers (716/62/A24) Jun 1962D/D PRO/NCB/6/870

The suitability of Aberpergwm Grains for Small Gravity Feed Boilers (715/62/A23) Jun 1962D/D PRO/NCB/6/870a

The suitability of Little Vein Grains for Small Gravity Feed Boilers (714/62/A22) Jun 1962D/D PRO/NCB/6/871

Comparison of the Performance of Natural and Manufactured Fuels in Domestic Appliances: Part 1 - Ash Pit Losses (713/62/A21) Jun 1962D/D PRO/NCB/6/872

Analysis of Pentremawr Culm entering Coed Bach Washery (712/62/1) Jun 1962D/D PRO/NCB/6/873

Trimsaran Screen and Washery Tips (711/62/1) Jun 1962D/D PRO/NCB/6/874

CONFIDENTIAL Test report on the Ardex Heating Stove (Mark II) (710/62/A20) May 1962D/D PRO/NCB/6/875

Gwendraith Opencast Site Little Vein (709/62/1) May 1962D/D PRO/NCB/6/876

The Suitability of Wernos Grains For Small Gravity Feed Boilers (708/62/A19) May 1962D/D PRO/NCB/6/877

Report on Products Ex Cynheidre Washery (707/62/1) May 1962D/D PRO/NCB/6/878

Brynlliw Colliery. Swansea 6 Ft. Seam (706/62/1) May 1962D/D PRO/NCB/6/879

Graig Merthyr Colliery Run-Of-Mine (705/62/1) May 1962D/D PRO/NCB/6/880

Fernhill Peas and Grains (704/62/A18) May 1962D/D PRO/NCB/6/881

The Suitability of Aberpergwm Grains for Small Gravity Feed Boilers (703/62/A17) May 1962D/D PRO/NCB/6/882

Report on Red Vein Through Coal as Mined at Danyrallt Licensed Mine (702/62/9) Apr 1962D/D PRO/NCB/6/883

Performance of Mild Heat Treated Briquettes in Domestic Appliances (701/62/A16) Apr 1962D/D PRO/NCB/6/884

Effect of Inclusion of Fines in Grains when used on a Gravity Feed Boiler (700/62/A15) Apr 1962D/D PRO/NCB/6/885

Yniscedwyn Colliery - White 4 Ft. Seam (699/62/A14) Apr 1962D/D PRO/NCB/6/886

Seam Analyses. Abernant Colliery - Brynlloi Seam (698/62/9) Apr 1962D/D PRO/NCB/6/887

Ashpit Losses in Mild Heat Treated Briquettes (697/62/A13) Apr 1962D/D PRO/NCB/6/888

Seam Analyses. Abercrave Colliery - White 4. Seam (696/62/9) Mar 1962D/D PRO/NCB/6/889

Annual Report 1961 (695/62/1 & 9) Mar 1962D/D PRO/NCB/6/890

The performance of Fernhill grains in a Small Gravity Feed Boiler (694/62/A12) Mar 1962D/D PRO/NCB/6/891

Seam Analyses. Wernos Colliery - Rock Vein (693/62/9) Mar 1962D/D PRO/NCB/6/892

Seam Analyses. Yniscedwyn Colliery - White 4 Seam (692/62/9) Mar 1962D/D PRO/NCB/6/893

Abernant Washery (691/62/9) Mar 1962D/D PRO/NCB/6/894

Performance of Dai 6 in domestic appliances (690/62/A11) Mar 1962D/D PRO/NCB/6/895

Interim Report on the Testing of the Janitor Junior Gravity Feed Boiler (688/62/A10) Mar 1962D/D PRO/NCB/6/896

Performance of Cross Hands Grains from Coedbach Washery in a Small Gravity Feed Boiler (687/62/A9) Mar 1962D/D PRO/NCB/6/897

Washability Tests on Cwmgwili Culm Sampled 27/3/62 (686/62/1) Mar 1962D/D PRO/NCB/6/898

Tests to determine Ash Pit Losses in Graigola Ovoids (685/62/A8) Mar 1962D/D PRO/NCB/6/899

The performance of Brynlliw Peas and Pea Nuts in the Janitor Junior Gravity Feed Boiler (684/62/A7) Feb 1962D/D PRO/NCB/6/900

The performance of Duffryn Rhondda 4 Ft Seam coal in domestic appliances (683/62/A6) Feb 1962D/D PRO/NCB/6/901

Washability Tests at Coed Bach Washery on Crosshands Coal, 12th February 1962 (682/62/1) Feb 1962D/D PRO/NCB/6/902

Memorandum about the Wernos Breaker in a sample of Onllwyn Cobbles (D9/112/6) n.d ?1962D/D PRO/NCB/6/903

The Performance of the Trianco P.65 Gravity Feed Boiler (680/62/A5) Feb 1962D/D PRO/NCB/6/904

Minutes of Meeting held at Cwmdu Laboratory on 24th January 1962 to discuss Coal Preparation Problems of Areas 1 and 9 (679/62/1 & 9) 1962D/D PRO/NCB/6/905

Pentremawr coal washed at Coed Bach (678/62/1) Feb 1962D/D PRO/NCB/6/905a

Blaenant Smalls (677/62/9) Feb 1962D/D PRO/NCB/6/906

The Dunn Spencer Bulkflo Demonstration (676/62/1.9) Jan 1962D/D PRO/NCB/6/907

Hendy Merthyr Colliery Rubbish Tip (675/62/1) Jan 1962D/D PRO/NCB/6/908

National Working Group Inter-Laboratory Check Test in the Stool Bottom Grate (674/62/A4) Jan 1962D/D PRO/NCB/6/909

Great Mountain Colliery Tip (777/63/1) May 1963D/D PRO/NCB/6/910

Mountain Colliery. Swansea Three Feet Seam. Sizing and Float and Sink Test (776/63/1) Apr 1963D/D PRO/NCB/6/911

Further Investigation into the Performance of Janitor Junior Mark 2 Gravity Feed Boiler (775/63/A52) Apr 1963D/D PRO/NCB/6/912a-b

Wernos Washery - Prevention of River Pollution (774/63/9) Mar 1963D/D PRO/NCB/6/913

Pwllbach Colliery. Investigation of the Effect of a B.J.D. Anderton 32 Disc Shearer on the Yield of Sized Products (773/63/9) Mar 1963D/D PRO/NCB/6/914

Ash Fusion of Cynheidre Products (772/63/1) Mar 1963D/D PRO/NCB/6/915

Brynlliw Middlings (771/63/1) Mar 1963D/D PRO/NCB/6/916

Arsenic in Anthracite Large (770/63/1) Mar 1963D/D PRO/NCB/6/917

Tests on Cwmgwili Coal at Cynheidre Washery (769/63/1) Mar 1963D/D PRO/NCB/6/918

Cynheidre. Prevention of River Pollution (768/63/1) Mar 1963D/D PRO/NCB/6/919

Degradation of Run-Of-Mine by Lorry and Rail Transport (767/63/1) Mar 1963D/D PRO/NCB/6/920

Assessment of Undergrate Losses Registered by M.H.T Briquettes (766/63/A51) Mar 1963D/D PRO/NCB/6/921a-b

Report on Trials on Earleymil Stoker at Gloucester House, Swansea, using Grains and Rice (765/63/1 & 9) Feb 1963D/D PRO/NCB/6/922

Annual Report 1962 (764/63/1 & 9) Feb 1963D/D PRO/NCB/6/923

Seam Analysis. Pantyffynnon Colliery. Stanllyd, Rocket and Unidentified Seams (763/63/9) Feb 1963D/D PRO/NCB/6/924

Tests on Cwmgwili Coal at Cynheidre Washery (762/63/1) Feb 1963D/D PRO/NCB/6/925

Performance of Anthracite Grains in a Small Gravity Feed Boiler (Barwen, Yniscedwyn, Brynlliw, Cynheidre and Onllwyn) (761/63/A50) Feb 1963D/D PRO/NCB/6/926

Cwmgwili Culm loaded into S/S Foxfield and S/S Marco Polo, Ex Swansea Docks (760/63/1) Feb 1963D/D PRO/NCB/6/927

Float and Sink Tests on Minus 5/8 Raw Feed to Onllwyn Washery (759/63/9) Feb 1963D/D PRO/NCB/6/928

Smoke Emission Tests from Open Fire Char Briquettes and Coalite (758/63/A49) Feb 1963D/D PRO/NCB/6/929

Cwmgwili R.O.M. and Culms Shipped from Swansea Docks, 14th - 17th January 1963 (757/63/1) Jan 1963D/D PRO/NCB/6/930

CONFIDENTIAL Report on the Trianco P65 Solid Fuel Gravity Feed Boiler (756/63/A48) Jan 1963D/D PRO/NCB/6/931

Pwllbach Colliery. Investigation of the effect of a B.J.D. Anderton 40 Disc Shearer and Pulsed Blasting on the yield of sized products (755/63/9) Jan 1963D/D PRO/NCB/6/932

Treatment of Anthracite Washed Grains (754/63/1) Jan 1963D/D PRO/NCB/6/933

Coke Trials on a Trianco P55 Gravity Feed Boiler (753/63/A47) Jan 1963D/D PRO/NCB/6/934

Field Tests on High Output Back Boilers with Central Heating Installations (752/63/A46) Jan 1963D/D PRO/NCB/6/935

Old Llwynon Surface Lands (751/62/1) Jan 1963D/D PRO/NCB/6/936

Cynheidre Washery. Test on Raw Coal and Products (750/62/1) Jan 1963D/D PRO/NCB/6/937

Performance of Ammanford Grains in a Small Gravity Feed Boiler (749/62/A45) Jan 1963D/D PRO/NCB/6/938

Performance of Gurnos Grains in a Small Gravity Feed Boiler (748/62/A44) Dec 1962D/D PRO/NCB/6/939

Washing of Brynlliw Coal at Brynlliw Washery (747/62/1) Dec 1962D/D PRO/NCB/6/940

Mountain Colliery. Swansea 3 Ft. Seam (746/62/1) Dec 1962D/D PRO/NCB/6/941

Performance of Red Vein Grains in a Small Gravity Feed Boiler (745/62/9) Nov 1962D/D PRO/NCB/6/942

Performance of Natural and Manufactured Fuels in Domestic Appliances (744/62/A43) Nov 1962D/D PRO/NCB/6/943

Performance of Pentremawr grains in a Small Gravity Feed Boiler (743/62/A42) Nov 1962D/D PRO/NCB/6/944

Anthracite Washed Duff. Ground Stocks Area No.1 (741/62/1) Oct 1962D/D PRO/NCB/6/945

Banwen Opencast Washery. An Examination of the Culm to Washery Seam - Eighteen Feet (740/62/9) Oct 1962D/D PRO/NCB/6/946

Performance of Glyncorrwg (Red Vein) Grains in a Small Gravity Feed Boiler (739/62/A40) Oct 1962D/D PRO/NCB/6/947

Performance of Aberpergwm Grains in a Small Gravity Feed Boiler (738/62/A39) Oct 1962D/D PRO/NCB/6/948

The Performance of the Senora No.2 Openable Stove without boiler (737/62/A38) Oct 1962D/D PRO/NCB/6/949

Performance of Glyncorrwg (Red Vein) Grains in a Small Gravity Feed Boiler (736/62/A37) Sep 1962D/D PRO/NCB/6/950

Smoke Emission from Natural Fuels. Part 1 - Volatile Matter Range 10% to 16% (735/62/A36) Sep 1962D/D PRO/NCB/6/951

Tests on Special Phurnacite (734/62/A35) Sep 1962D/D PRO/NCB/6/952

CONFIDENTIAL Report on the Trianco P55 Solid Fuel Domestic Boiler (730/62/A34) Aug 1962D/D PRO/NCB/6/953

Performance of Banwen Grains in a Small Gravity Feed Boiler (733/62/A33) Aug 1962D/D PRO/NCB/6/954

Performance of Gurnos Grains in a Small Gravity Feed Boiler (732/62/A32) Aug 1962D/D PRO/NCB/6/955

Washability Tests. Cwmgwili Coal Tested at Cynheidre Washery (729/62/1) Jul 1962D/D PRO/NCB/6/956

Brynlliw Colliery. Swansea 6 Ft. Seam (728/62/1) Jul 1962D/D PRO/NCB/6/957

An Investigation into the effect of Calgon on the burning properties of Wernos Beans in a Janitor Junior Boiler (727/62/A31) Jul 1962D/D PRO/NCB/6/958

Performance of Caerau, Coegnant and St. Johns housecoals in the open grate (726/62/A30) Jul 1962D/D PRO/NCB/6/959

Domestic Boiler Tests on Nantgarw Singles (829/63/A80) Oct 1963D/D PRO/NCB/6/960

Brynlliw Colliery. An Assessment of Coal Breakage at Underground and Surface Transfer Points by use of Transit Shock Breakers (827/63/1) Oct 1963D/D PRO/NCB/6/961

Screening Analysis of Smalls and Duffs. Area No. 9 (826/63/9) Oct 1963D/D PRO/NCB/6/962

Screening Analysis of Smalls and Duffs. Area No. 1 (825/63/1) Oct 1963D/D PRO/NCB/6/963

Kelston Line Pump (824/63/1 & 9) Oct 1963D/D PRO/NCB/6/964

Domestic Boiler Tests on Nantgarw Singles (823/63/A78) Oct 1963D/D PRO/NCB/6/965

Domestic Boiler Tests on Nantgarw Singles (822/63/A77) Oct 1963D/D PRO/NCB/6/966

Domestic Boiler Tests on Nantgarw Singles (820/63/A75) Oct 1963D/D PRO/NCB/6/967

Performance of Avenue and Manvers Sunbrite Coke Beans in the Trianco P55 (819/63/A74) Oct 1963D/D PRO/NCB/6/968a-b

Domestic Boiler Tests on Nantgarw Singles (818/63/A73) Oct 1963D/D PRO/NCB/6/969

Graig Merthyr Culm to Brynlliw Washery - 17th August, 1963 (817/63/1) Sep 1963D/D PRO/NCB/6/970

Abercrave Colliery. An Assessment of Coal Breakage at Underground Conveyor Transfer Points by use of Transit Shock Recorders (816/63/9) Sep 1963D/D PRO/NCB/6/971

Yniscedwyn Colliery. An Assessment of Coal Breakage at Underground and Surface Conveyor Transfer Points by use of Transit Shock Recorders (815/63/9) n.d {1963}D/D PRO/NCB/6/972

Rejects Pentremawr Grains (814/63/1) Sep 1963D/D PRO/NCB/6/973

Domestic Boiler Tests on Nantgarw Singles (812/63/A71) Sep 1963D/D PRO/NCB/6/974

Cynheidre Nos 1 and 2 Collieries. An Asssessment of Coal Breakage at Underground Conveyor Transfer Points by use of Transit Shock Recorders (811/63/1) Sep 1963D/D PRO/NCB/6/975

Domestic Boiler Tests on Nantgarw Singles (813/63/A72) Sep 1963D/D PRO/NCB/6/976

Domestic Boiler Tests on Nantgarw Singles (812/63/A71) Sep 1963D/D PRO/NCB/6/977

Performance of Mountain Grains in a Small Gravity Feed Boiler (810/63/A70) Sep 1963D/D PRO/NCB/6/978

Performance of Gloda Grains in a Small Gravity Feed Boiler (809/63/A69) Sep 1963D/D PRO/NCB/6/979

Performance of Graig Merthyr Grains in a Small Gravity Feed Boiler (808/63/A68) Sep 1963D/D PRO/NCB/6/980

Performance of Cwmgwili Grains in a Small Gravity Feed Boiler (807/63/A67) Sep 1963D/D PRO/NCB/6/981

Abernant Coal Preparation Plant. An Assessment of Coal Breakage at Conveyor Transfer Points by use of Transit Shock Recorders (806/63/9) Sep 1963D/D PRO/NCB/6/982

Further Tests on Aberdare Valley Nuts in the Beeston Domestic Boiler (805/63/A66) Sep 1963D/D PRO/NCB/6/983

Domestic Boiler Tests on Nantgarw Singles (8084/63/A65) Aug 1963D/D PRO/NCB/6/984

Domestic Smoke Measurement. Results of further tests on C.R.E. Char Briquettes (803/63/A64) Aug 1963D/D PRO/NCB/6/985

Maesgwyn B Stocking Ground Effluent to Blaen-Nant-Y-Gwyddyl Farm (802/63/9) Aug 1963D/D PRO/NCB/6/986

Domestic Boiler Tests on Nantgarw Singles (801/63/A63) Aug 1963D/D PRO/NCB/6/987

Domestic Smoke Measurements. Test Results for C.R.E. Char Briquettes Tested According to Fifth D.S. Draft (800/63/A62) Aug 1963D/D PRO/NCB/6/988

Graig Merthyr - Dump at Sidingsfach of House Coal Cleanings (799/63/1) Aug 1963D/D PRO/NCB/6/989

Domestic Boiler Tests on Nantgarw Singles (798/63/A61) Aug 1963D/D PRO/NCB/6/990

Joint Sampling with the Central Electricity Generating Board of R.W. Smalls (797/63/1 & 9) Aug 1963D/D PRO/NCB/6/991

Performance of Cwmgorse and Abernant Grains in a Small Gravity Feed Boiler (796/63/A60) Aug 1963D/D PRO/NCB/6/992

Domestic Boiler Tests on Nantgarw Singles (794/63/A59) Aug 1963D/D PRO/NCB/6/993

Domestic Boiler Tests on Nantgarw Singles (793/63/A59) Jul 1963D/D PRO/NCB/6/994

Seam Analyses Pantyffynnon Colliery - Stanllyd and Unidentified Seams (792/63/9) Jul 1963D/D PRO/NCB/6/995

Cwmgwili: Comparison of Run-Of-Mine by Different Methods of Mining (791/63/1) Jul 1963D/D PRO/NCB/6/996

Weights and Measures Bill - Moisture Drainage Allowance (789/63/1 & 9) Jul 1963D/D PRO/NCB/6/997

Export Sampling - Swansea Docks (788/63/1 & 9) Jul 1963D/D PRO/NCB/6/998

Glencastle Colliery. Lower and Upper Four Feet Seams (787/63/9) Jun 1963D/D PRO/NCB/6/999

Brynlliw Middlings (786/63/1) Jun 1963D/D PRO/NCB/6/1000

Performance of Merthyr Vale Grains in a Small Gravity Feed Boiler (785/63/A57) Jun 1963D/D PRO/NCB/6/1001

Performance of Glyncastle Washed Grains in a Small Gravity Feed Boiler (784/63/A56) Jun 1963D/D PRO/NCB/6/1002

Domestic Boiler Tests on Nantgarw Sunbrite Singles (783/63/A55) Jun 1963D/D PRO/NCB/6/1003

Onllwyn No.1 - Sizing Test of R.O.M. Date of Test 2nd and 20th March, 1963 (782/63/9) Jun 1963D/D PRO/NCB/6/1004

Grains - Cynheidre Washery (781/63/1) May 1963D/D PRO/NCB/6/1005

Report on Trials carried out on the Davey Saphire Domestic Appliance (780/63/A54) May 1963D/D PRO/NCB/6/1006

Pwllbach Colliery. Investigation of the Effect of a B.J.D. Anderton 36 Bi-Directional Spiral Vane Disc on the Yield of Sized Products (779/63/9) May 1963D/D PRO/NCB/6/1007

The Performance of Aberdare Valley Nuts in the Beeston Domestic Boiler (778/63/A53) May 1963D/D PRO/NCB/6/1008

Cwmgwili - Run-Of-Mine, March, 1964 (875/64/1) Mar 1964D/D PRO/NCB/6/1009

Brynlliw S.2 Plough Face (873/64/1) Mar 1964D/D PRO/NCB/6/1010

Brynteg Colliery - Tips (872/64/9) Feb 1964D/D PRO/NCB/6/1011

Abernant Colliery. Investigations on the effect of a Reisshakenobel Plough, B.J.D. 48 Disc Shearer, and Undercutting and handfilling on the yield of sized products. Includes memorandum on sizing analysis at Abernant Colliery (871/64/9) Feb 1964D/D PRO/NCB/6/1012

Brynlliw Coal Preparation Plant Drying of Filter Cake on Vacuum Drum (870/64/1) Feb 1964D/D PRO/NCB/6/1013

Selection of Grains for the Small Anthracite Supply Scheme (869/64/A99) Feb 1964D/D PRO/NCB/6/1014

Performance of M.H.T. Briquettes in the Crane Boiler (868/64/A98) Feb 1964D/D PRO/NCB/6/1015

Graig Merthyr Small Nuts sent to Brynlliw for Re-Washing (867/64/1) Feb 1964D/D PRO/NCB/6/1016

Prevention of River Pollution Joint Sampling with Glamorgan River Board (866/64/9) Feb 1964D/D PRO/NCB/6/1017

Brynlliw Colliery S.2. Plough Face (865/64/1) Feb 1964D/D PRO/NCB/6/1018

Wernos Screens and Coal Preparation Plant. An Assessment of Coal Breakage at Conveyor Transfer Points by use of Transit Shock Recorders (864/64/9) Feb 1964D/D PRO/NCB/6/1019

The Performance of Abercynon Large and Small Washed Nuts in the Beeston Boiler (863/64/A97) Feb 1964D/D PRO/NCB/6/1020

The Performance of Penallta Nuts in the Parkray 77 Openable Stove with back boiler (862/64/A96) Feb 1964D/D PRO/NCB/6/1021

CONFIDENTIAL Test Report on the Aga 65A Gravity Feed Boiler (861/64/A95) Feb 1964D/D PRO/NCB/6/1022

Water Pumped from Clydach Merthyr Colliery (860/64/1) Jan 1964D/D PRO/NCB/6/1023

Dillwyn Colliery. An Assessment of Coal Breakage at Underground Conveyor Transit Points by use of Transit Shock Recorders (859/64/1) Jan 1964D/D PRO/NCB/6/1024

Performance of Pentrecleydan and Aberpergwm Grains in a Small Gravity Feed Boiler (858/64/A94) Jan 1964D/D PRO/NCB/6/1025

Graig Merthyr - Ash of Dry Duff (857/64/1) Jan 1964D/D PRO/NCB/6/1026

Test on Cwmgwili Culm washed at Cynheidre Washery (856/64/1) Jan 1964D/D PRO/NCB/6/1027

Laboratory Investigation into cause of Explosions in Trianco Boilers (855/64/A93) Jan 1964D/D PRO/NCB/6/1028

Varteg Colliery. An Assessment of Coal Breakage at Underground Conveyor Transfer Points by use of Transit Shock Recorders (853/64/9) Jan 1964D/D PRO/NCB/6/1029

Daren Colliery. Run-Of-Mine Test - 11 December, 1963 (852/63/1) Jan 1964D/D PRO/NCB/6/1030

Undergrate Loss from M.H.T. Briquettes (851/63/A92) Dec 1963D/D PRO/NCB/6/1031

Cynheidre Washery. New Screen for Grains and Duff (850/63/1) Dec 1963D/D PRO/NCB/6/1032

Mountain Run-Of-Mine Swansea Three Feet Seam (849/63/1) Dec 1963D/D PRO/NCB/6/1033

Cynheidre Colliery. Analysis of Gas Supplies. - Gras Level 2 Following Fire on 10th December 1963 (848/63/1) Dec 1963D/D PRO/NCB/6/1034

Notes on Tests Carried Out in the Parkray 77 Openable Stove (847/63/A91) Dec 1963D/D PRO/NCB/6/1035

Anthracite Grains - Small Anthracite Supply Scheme (846/63/1&9) Dec 1963D/D PRO/NCB/6/1036

Undergrate Loss from M.H.T. Briquettes (845/63/A90) Dec 1963D/D PRO/NCB/6/1037

Performance of Pentreclwydau Grains in a Small Gravity Feed Boiler (844/63/A89) Dec 1963D/D PRO/NCB/6/1038

Performance of Cwmgwili Grains in a Small Gravity Feed Boiler (843/63/A88) Dec 1963D/D PRO/NCB/6/1039

Pwllbach Colliery. An Assessment of Coal Breakage at Underground Conveyor Transfer Points by use of Transit Shock Recorders (842/63/9) Dec 1963D/D PRO/NCB/6/1040

Cynheidre Coal Preparation Plant. An Assessment of Coal Breakage at Transfer Points by use of Transit Shock Recorders (841/63/1) Dec 1963D/D PRO/NCB/6/1041

Laboratory Investigation into cause of Explosions in Trianco Boilers (839/63/A87) Nov 1963D/D PRO/NCB/6/1042

Flue Gas Explosions in Trianco Boilers. Field Tests in Cardiff Area (838/63/A86) Nov 1963D/D PRO/NCB/6/1043

New Blaenant Drift (837/63/9) Nov 1963D/D PRO/NCB/6/1044

Cefn Coed Colliery. An Assessment of Coal Breakage at Underground Conveyor Transit Points by use of Transit Shock Recorders (836/63/9) Nov 1963D/D PRO/NCB/6/1045

Domestic Boiler Tests on Nantgarw Singles (835/63/A85) Nov 1963D/D PRO/NCB/6/1046

CONFIDENTIAL Test Report on the Tresor Solid Fuel Cooker (834/63/A84) Oct 1963D/D PRO/NCB/6/1047

Samples from Individual Faces at Pentremawr Colliery (833/63/1) Nov 1963D/D PRO/NCB/6/1048

Performance tests in Small Gravity Feed Boilers on a sample of Pea/Grain mixture received from Guernsey (832/63/A83) Nov 1963D/D PRO/NCB/6/1048a

Domestic Boiler Tests on Nantgarw Singles (831/63/A82) Nov 1963D/D PRO/NCB/6/1049

CONFIDENTIAL Oiling of Anthracite Grains (830/63/A81) Nov 1963D/D PRO/NCB/6/1050

Pentremawr - Arsenic in Large Coal (939/64/1) Nov 1964D/D PRO/NCB/6/1051

Performance of Ogmore Washed Nuts and Washed Cobbles in a Stool Bottom Grate (938/64/A129) Nov 1964D/D PRO/NCB/6/1052

Report of the meeting held on September 28th 1964 at Cwmdu Laboratory between Dr. Wrobel of Messrs. Float Ore Ltd and Messrs. H.R. Warren and C. K. Phillips (937/64/1) 1964D/D PRO/NCB/6/1053a-b

Surface Treatment of Coals and Briquettes using Superglaze no.6. Interim Report Jun 1964D/D PRO/NCB/6/1054

Snauger Flexible Conveyor (936/64/1) Nov 1964D/D PRO/NCB/6/1055

CONFIDENTIAL Test Report on the Aga GF 125B Gravity Feed Boiler (935/64/A128) Nov 1964D/D PRO/NCB/6/1056

Graig Merthyr - Lliw Development. Possible Water for Pit Head Baths (934/64/1) Oct 1964D/D PRO/NCB/6/1057

Prevention of River Pollution. Fixed Trials at Cynheidre Using Naico 632 Polyelectrolyte Flocculant (933/64/1) Oct 1964D/D PRO/NCB/6/1058

Sunbrite as a Test Fuel (932/64/A127) Oct 1964D/D PRO/NCB/6/1059

Performance of Ogmore Washed Nuts and Washed Cobbles in a Stool Bottom Grate (931/64/A126) Oct 1964D/D PRO/NCB/6/1060

Performance of Cynheidre, Brynlliw and Mountain Grains in a Small Gravity Feed Boiler (930/64/A125) Oct 1964D/D PRO/NCB/6/1061

Blaenant Coal Ash and Sulphur Distribution on Washing (929/64/9) Oct 1964D/D PRO/NCB/6/1062

Performance of the Unifa 60 Convector Stove (928/64/A124) Oct 1964D/D PRO/NCB/6/1063

Ynisarwed and Garth Merthyr Colliery Surface Tips (927/64/9) Oct 1964D/D PRO/NCB/6/1064

Testing of M.H.T. Briquettes in a small Domestic Boiler (926/64/A123) Oct 1964D/D PRO/NCB/6/1065

Performance of Ogmore and Caerau coals on a Stool Bottom Grate (925/64/A122) Oct 1964D/D PRO/NCB/6/1066

Abernant Colliery. Investigation of the effect of a Trepan Shearer on the yield of sized products from the E3 Face (921/64/9) Sep 1964D/D PRO/NCB/6/1067

Brynlliw Seam Analysis. Swansea Six Feet Seam (920/64/1) Sep 1964D/D PRO/NCB/6/1068

Graig Merthyr Ash and Moisture of Dry Smalls (919/64/1) Sep 1964D/D PRO/NCB/6/1069

Comparative Performance tests of Sunbrite and Gas Cokes in a Small Domestic Boiler (918/64/A119) Sep 1964D/D PRO/NCB/6/1070

The Performance of Ogmore Washed Cobbles in a Stool Bottom Grate (914/64/A117) Aug 1964D/D PRO/NCB/6/1071

Approval Testing of the Powell Dyffryn Janitor A60 and A80 Gravity Feed Boilers (911/64/A114) Jul 1964D/D PRO/NCB/6/1072

The Performance of Pendinham Washed Large in a Stool Bottom Grate (912/64/A115) Aug 1964D/D PRO/NCB/6/1073

Lindsay Colliery. An Assessment of coal breakage at the Tram Tippler at Lindsay Colliery Surface (910/64/1) Aug 1964D/D PRO/NCB/6/1074

Cynheidre Colliery. Analysis of Gas Samples - No.10 Panel Big Vein - following fire on 6th June 1964 (908/64/1) Aug 1964D/D PRO/NCB/6/1075

The Performance of the Davey Sapphire Mark 2 Inset Openable Stove with high output Back Boiler (907/64/A112) Jul 1964D/D PRO/NCB/6/1076

Mountain Colliery - Crushed Coal. Swansea Three Feet Seam (906/64/1) Jul 1964D/D PRO/NCB/6/1077

Washing Current Graig Merthyr Washery Discard at Sidings Fach Washery (Messrs. Martin Cowleys). Date of test 2nd and 3rd July, 1964 (905/64/1) Jul 1964D/D PRO/NCB/6/1078

Washing of Tumble Dump Material at Sidings Fach Washery (Messrs. Martin Cowleys). Date of Test 6.7.64 (904/64/1) Jul 1964D/D PRO/NCB/6/1079

Garngoch No.3 Colliery. Swansea Five Feet Seam (903/64/1) Jul 1964D/D PRO/NCB/6/1080

Cefn Coed Z Face (902/64/9) Jul 1964D/D PRO/NCB/6/1081

Cwmgwili Colliery. Seam Samples - Big Vein (901/64/1) Jul 1964D/D PRO/NCB/6/1082

Pentremawr - Size Distribution of Culm sent to Coed Bach Washery (900/64/1) Jun 1964D/D PRO/NCB/6/1083

Seam Analyses. Pantyffynnon Colliery. Penny Pieces Seams (898/64/9) Jun 1964D/D PRO/NCB/6/1084

Cynheidre - Prevention of River Pollution from Washery and Surrounding Area (897/64/1) Jun 1964D/D PRO/NCB/6/1085

Investigation on behalf of Coal Products Division on: 1. Effect of Additives on the performance of M.H.T. Briquettes. 2. Banking level of Phurnacite. 3. Smoke Emmission of M.H.T. Briquettes. 4. M.H.T. Briquettes in Parkray 77 Openable Stove (896/64/A110) Jun 1964D/D PRO/NCB/6/1086

Cynheidre - Prevention of River Pollution (895/64/1) Jun 1964D/D PRO/NCB/6/1087

Report on Domestic Trials of Anthracite, Roomheat and M.H.T. Ovoids (894/64/A109) May 1964D/D PRO/NCB/6/1088

Report on Complaint of Excessive Heating of Tile Surround above Rayburn Princess Appliance (892/64/A107) May 1964D/D PRO/NCB/6/1089

Cwmgwili - Run-Of-Mine Analysis of Float 1.45 Material (891/64/1) May 1964D/D PRO/NCB/6/1090

Performance of M.H.T. Briquettes in modern domestic appliances (890/64/A106) May 1964D/D PRO/NCB/6/1091

Pentremawr Saleable (889/64/1) May 1964D/D PRO/NCB/6/1092

Ammanford Colliery. An Assessment of Coal Breakage at Underground Transfer Points by use of Transit Shock Recorders (888/64/9) Apr 1964D/D PRO/NCB/6/1093

Abernant Colliery. Investigation of the effect of a Reisshakenhobel Plough, and a 48 B.J.D Disc Shearer on the Yield of Sized Products (887/64/9) Apr 1964D/D PRO/NCB/6/1094

Letter from A. W. Davies, Manager, Technical to S. Crook, Area Chief Scientist relating to the Unifa 60 Free-standing Solid Fuel Room Heater. Oct 1964D/D PRO/NCB/6/1095

Mountain Colliery Run-Of-Mine - 7th February, 1964 (886/64/1) Apr 1964D/D PRO/NCB/6/1096

Report on Domestic Trial of C.R.E. Roomheat (885/64/A105) Apr 1964D/D PRO/NCB/6/1097

Performance of M.H.T. Briquettes in the Crane 20A Boiler (884/64/A104) Apr 1964D/D PRO/NCB/6/1098

Pollution Prevention. Martin Cowleys Washery at Sidings Fach (883/64/1) Apr 1964D/D PRO/NCB/6/1099

Wernos Washery. Prevention of River Pollution (882/64/9) Apr 1964D/D PRO/NCB/6/1100

Abergelli Colliery Tips (881/64/1) Apr 1964D/D PRO/NCB/6/1101

Colliery Waste Tip - Seven Sisters (880/64/9) Apr 1964D/D PRO/NCB/6/1102

Performance of Gloda Grains in a Small Gravity Feed Boiler (879/64/A103) Apr 1964D/D PRO/NCB/6/1103

Brynlliw Washery. Run-Of-Mine Test 4th March, 1964 (878/64/1) Apr 1964D/D PRO/NCB/6/1104

Smoke emission from M.H.T. briquettes (877/64/A102) Apr 1964D/D PRO/NCB/6/1104a

The Performance of a blend of Peacock and Cornish Grains in a Small Gravity Feed Boiler (876/64/A101) Apr 1964D/D PRO/NCB/6/1105

Smoke Emission from M.H.T. Briquettes Manufactured at the Crown Hill Works, Cardiff (1037/66/A177) Mar 1966D/D PRO/NCB/6/1106

Performance of crushed Phurnacite in a Small Gravity Feed Appliance (1036/66/A176) Feb 1966D/D PRO/NCB/6/1107

Performance of Tirbach Grains (ex Coed Bach Washery), in a Small Gravity Feed Appliance (1035/66/A175) Feb 1966D/D PRO/NCB/6/1108

Performance of Barwen Grains (ex G.C.G. Washery) in a Small Gravity Feed Appliance (1034/66/A174) Feb 1966D/D PRO/NCB/6/1109

Combustibles in Flue Gases when using various fuels in a Glass Fronted Appliance (1031/66/A171) Feb 1966D/D PRO/NCB/6/1110

Performance of Davey Inset Room Heater with boiler modifications and using various sizes of anthracite (1031/66/A171) Feb 1966D/D PRO/NCB/6/1110a

Smoke emission from M.H.T Briquettes at the Crown Fuel Works Cardiff (1030/66/A170) Feb 1966D/D PRO/NCB/6/1111

The performance of Banwen washed grains in a Small Gravity Feed Boiler (1029/66/A169) Feb 1966D/D PRO/NCB/6/1111a

The Performance of Homefire in a Stool Bottom Grate (1028/66/A168) Feb 1966D/D PRO/NCB/6/1112

The Performance of Aberpergwm Washed Grains in a Small Gravity Feed Boiler (1027/66/A167) Feb 1966D/D PRO/NCB/6/1113

The Performance of Aberpergwm Washed Grains in a Small Gravity Feed Boiler (1026/66/A166) Jan 1966D/D PRO/NCB/6/1114

The Performance of Taff Merthyr 9 Ft large in a Stool Bottom Grate (1025/66/A165) Jan 1966D/D PRO/NCB/6/1115

The Performance of Gloda Washed Grains in a Small Gravity Feed Boiler (1024/66/A164) Jan 1966D/D PRO/NCB/6/1116

Abernant Culm to Abernant Washery (1023/66/1) Jan 1966D/D PRO/NCB/6/1117

Pantyffynon Culm to Wernos Washery (1022/66/1) Jan 1966D/D PRO/NCB/6/1118

The Performance of Banwen and Onllwyn Washed Grains and Peas in Gravity Feed Appliances (1021/66/A163) Jan 1966D/D PRO/NCB/6/1119

Smoke Emission from M.H.T. Briquettes manufactured at the Crown Fuel Works, Cardiff (1020/66/A162) Jan 1966D/D PRO/NCB/6/1120

The Performance of Cwmmawr Grains and Beans in Small Gravity Feed Appliances (1019/66/A161) Jan 1966D/D PRO/NCB/6/1121

Abernant Middlings (1018/66/1) Jan 1966D/D PRO/NCB/6/1122

Abernant Washery - Washing Test Of Abernant Red Vein Seam-Date Of Test 12/14.10.65 (1017/65/1) Dec 1965D/D PRO/NCB/6/1123

Breaking of French Nuts at Cynheidre Washery - 12th December, 1965 (1016/65/1) Dec 1965D/D PRO/NCB/6/1124

Cynheidre Middlings to Brynlliw Washery (1015/65/1) Dec 1965D/D PRO/NCB/6/1125

Cynheidre Washery - French Nuts (1014/65/1) Dec 1965D/D PRO/NCB/6/1126

Harnlo Seam from Blaina Deep Opencast Site (1013/65/1) Dec 1965D/D PRO/NCB/6/1127

Handleability of Brynlliw Mixed Duff. Short report on visit to Brynlliw Washery 8.12.65 (1012/65/1) Dec 1965D/D PRO/NCB/6/1128

The Performance of Phurnacite in a small domestic boiler (1011/65/A160) Dec 1965D/D PRO/NCB/6/1129

Redcliffe Flats, Bristol. Report on extent of Corrosion of Concrete Bunkers (1010/65/1) Nov 1965D/D PRO/NCB/6/1130

Smoke Emission from M.H.T. Briquettes manufactured at the Crown Fuel Works, Cardiff (1009/65/A159) Nov 1965D/D PRO/NCB/6/1131

Smoke Emission from Homefire Manufactured open fire fuel (Inter-laboratory check tests) (1008/65/A158) Nov 1965D/D PRO/NCB/6/1132

The Performance of Taff Merthyr Nine Foot Seam Large in a Stool Bottom Grate (1007/65/A157) Nov 1965D/D PRO/NCB/6/1133

Lliw Development - Graig Merthyr (1006/65/1) Nov 1965D/D PRO/NCB/6/1134

Land Adjoining East Pit Surface G.C.G T.E. Harris, Brynllefrith, Cwmllynfell (1005/65/1) Nov 1965D/D PRO/NCB/6/1135

Performance of the Linco Convector Super K5 without boiler (1004/65/A156) Nov 1965D/D PRO/NCB/6/1136

Testing of Phurnacite on The Crane 20a Domestic Boiler (1003/65/A155) Oct 1965D/D PRO/NCB/6/1137

Performance of the prototype B.K." Gravity Feed Boiler manufactured by Kayanson Engineers Ltd (1002/65/A154) Oct 1965D/D PRO/NCB/6/1138

Preparation and Sale of Filter Coal at Cwmdu Laboratory (1001/65/1) Oct 1965D/D PRO/NCB/6/1139

Boffin Coals (1000/65/1) Sep 1965D/D PRO/NCB/6/1140

Proposed New Filter Coal Plant (999/65/1) Sep 1965D/D PRO/NCB/6/1141a-b

Recoverable Coal in Tips at Pentremawr Colliery (998/65/1) Sep 1965D/D PRO/NCB/6/1142

General Instructions for Stocking Coal to prevent Spontaneous Combustion (997/65/1) Sep 1965D/D PRO/NCB/6/1143

Graig Merthyr - Rubbish Tip (995/65/1) Sep 1965D/D PRO/NCB/6/1144

Morlais Colliery. Analysis of Swansea Five Feet Seam (994/65/1) Sep 1965D/D PRO/NCB/6/1145

Tests of Abernant and Cynheidre Washery Refuse (993/65/1) Sep 1965D/D PRO/NCB/6/1146

Interim Report. P.D. SF.44 Boiler (992/65/A153) Aug 1965D/D PRO/NCB/6/1147

Daren - Rubbish Tips (991/65/1) Aug 1965D/D PRO/NCB/6/1148

Tests on the Unicorn Mini-Auto Burner when coupled to three types and sizes of boilers (989/65/A152) Aug 1965D/D PRO/NCB/6/1149

Performance of a test sample prepared from Llety Brongu large coal (988/65/A151) Aug 1965D/D PRO/NCB/6/1150

Test Washing of Cynheidre Middlings at Brynlliw Washery. Date of Test 31.5.65 (987/65/1) Jul 1965D/D PRO/NCB/6/1151

Testing of Phurnacite in a small domestic boiler (986/65/A150) Jun 1965D/D PRO/NCB/6/1152

Wernos Colliery. Analysis of Mine Air Samples - R11 Face Rock Vein Following Gas Ignition on 23rd June 1965 (985/65/1) Jun 1965D/D PRO/NCB/6/1153

Mountain Colliery - Effluent (984/65/1) Jun 1965D/D PRO/NCB/6/1154

Tests in Stokermatic Boiler B.65 using a range of Welsh Coals (980/65/A146) May 1965D/D PRO/NCB/6/1155

Wernos Washery. Washing Test on Middle Pumpquart Seam from Pantyffynon Colliery (979/65/1) May 1965D/D PRO/NCB/6/1156

An Assessment of Coal Breakage at Underground and Surface Transfer Points (979/65/1A) May 1965D/D PRO/NCB/6/1157

Performance of Wernos Grains in a small Gravity Feed Boiler (978/65/A145) May 1965D/D PRO/NCB/6/1158

The Performance of a test sample prepared from Coed Bychan unwashed large coal (977/65/A144) May 1965D/D PRO/NCB/6/1159

Garngoch Colliery Smalls (976/65/1) Apr 1965D/D PRO/NCB/6/1160

Test Wash on Lindsay Colliery Coal at Wernos Washery 27th March, 1965 (975/65/1) Apr 1965D/D PRO/NCB/6/1161

Analysis of Middlings (974/65/1) Apr 1965D/D PRO/NCB/6/1162

Analysis of Onllwyn Washed Products (973/65/1) Apr 1965D/D PRO/NCB/6/1163

Glasbrooks Smalls (972/65/1) Apr 1965D/D PRO/NCB/6/1164

Performance of the Couvinoise FC20 Convector Stove without Boiler (971/65/A143) Apr 1965D/D PRO/NCB/6/1165

Brynlliw Washery. Examination of Feed to Washery Graig Merthyr Culm (969/65/1) Mar 1965D/D PRO/NCB/6/1166

Performance of Cefn Coed, Abercrave and Yniscedwyn Grains in a Small Gravity Feed Boiler (968/65/A141) Mar 1965D/D PRO/NCB/6/1167

Performance of Wernos Grains in a Small Gravity Feed Boiler (967/65/A140) Mar 1965D/D PRO/NCB/6/1167a

Complaint of Blow Backs in a Trianco C80 Gravity Feed Boiler (966/65/A139) Mar 1965D/D PRO/NCB/6/1168

Graig Merthyr Colliery. Incident at W.B.Face, West District on 23rd February, 1965 (965/65/1) Mar 1965D/D PRO/NCB/6/1169

Brynlliw Washery. Examination of Feed to Washery - Brynlliw Coal (964/65/1) Mar 1965D/D PRO/NCB/6/1170

Yniscedwyn Washing Test at Onllwyn Central Washery. Date of Test - 17th February, 1965 (963/65/9) Mar 1965D/D PRO/NCB/6/1171

Culms to Cynheidre Washery (962/65/1) Feb 1965D/D PRO/NCB/6/1172

Annual Report 1964 (961/65/1 & 9) Feb 1965D/D PRO/NCB/6/1173

Abercrave Washing Test at Onllwyn Central Washery. Date of Test - 10th February, 1965 (959/65/9) Feb 1965D/D PRO/NCB/6/1174

Domestic Smoke Measurements. Check test using Homefire manufactured fuel (958/65/A137) Feb 1965D/D PRO/NCB/6/1175

Cefn Coed Washing Test at Onllwyn Central Washery. Dates of Test, 3rd & 4th February 1965 (957/65/9) Feb 1965D/D PRO/NCB/6/1176

Performance of Ffaldau, International and Garw Washed Cobbles in a Stool Bottom Grate (956/65/A135) Feb 1965D/D PRO/NCB/6/1177

Aga GF 45 Boiler Modifications and Trials (955/65/A136) Feb 1965D/D PRO/NCB/6/1178

Yniscedwyn Colliery Seam Sample - White Four Feet Sampled 15th January, 1965 (954/65/9) Jan 1965D/D PRO/NCB/6/1179

Scientific Department - Areas 1 & 9 January, 1965 (953/65/1 & 9) Jan 1965D/D PRO/NCB/6/1180

Washing Test on Graig Merthyr Tip (Above Washery) at Sidings Fach Washery. Date of Test 1st January, 1965 (952/65/1) Jan 1965D/D PRO/NCB/6/1181

Wernos Washery. An Examination of the Yield of Products from Individual Seams Forming the Feed to the Washery - December, 1964 (951/65/9) Jan 1965D/D PRO/NCB/6/1182

Cynheidre Washery. New Centrifuge in Washery (950/65/1) Jan 1965D/D PRO/NCB/6/1183

Abercrave Tip - Coal recovered by Messrs. Peppers Washery (949/65/9) Jan 1965D/D PRO/NCB/6/1184

Blow-backs in small domestic closed appliances when burning M.H.T. Briquettes (948/65/A134) Jan 1965D/D PRO/NCB/6/1185

Test report on the Waterford Solid Fuel Cooker (946/65/A132) Dec 1964D/D PRO/NCB/6/1186

The Performance of Lady Windsor Small Nuts and Cobbles in Domestic Appliances (947/63/A133) Jan 1965D/D PRO/NCB/6/1187

Report on Heating of Paladin New Sun Cottages, Radstock (946/65/1) Jan 1965D/D PRO/NCB/6/1188

Performance of Ogilvie Nuts and Cobbles and Penallta Nuts and Cobbles in the Stool Bottom Grate (944/65/A131) Dec 1964D/D PRO/NCB/6/1189

Washability Test at Coed Bach Washery on Cwmgwili Coal - 2nd December, 1964 (943/65/1) Jan 1965D/D PRO/NCB/6/1190

Report on ash contents of Garngoch No.3 coals (942/64/1) Dec 1964D/D PRO/NCB/6/1191

Garngoch 3 - Ash Contents of Culm from each district. Sampled 1 & 10.12.64 (941/64/1)D/D PRO/NCB/6/1192

Washing of Individual Coals at Wernos Central Washery. Period 26th - 28th October, 1966 (1110/66/1) Nov 1966D/D PRO/NCB/6/1193

Appliance Tests of Coals Washed at Wernos Washery (1111/66/A219) Nov 1966D/D PRO/NCB/6/1194

Pentremawr Culm Washed at Cynheidre Washery. Date of Test - 13th November, 1966. Nov 1966D/D PRO/NCB/6/1195

Tabulated test results from Wernos Washery, 21.9.66 and 29.10.66. 1966D/D PRO/NCB/6/1196

Tabulated test results from trial washes at Wernos Washery. n.d. ?1966D/D PRO/NCB/6/1197

Test report on the Beekay CF 120/90 gravity feed boiler (1113/66/A220) Dec 1966D/D PRO/NCB/6/1198

The Performance of Penallta Cobbles in a Stool Bottom Grate (1109/66/A218) Nov 1966D/D PRO/NCB/6/1199

Smoke Emission from M.H.T. briquettes manufactured at the Crown Fuel Works, Cardiff (1108/66/A217) Nov 1966D/D PRO/NCB/6/1200

Wernos Washery. Washing of Cwmgwili, Lindsay and Pantyffynon R.O.M.s, September, 1966 (1107/66/1) Nov 1966D/D PRO/NCB/6/1201

Smoke Emission from M.H.T. briquettes taken during the Wast Drayton Handleability Trial (1106/66/A216) Nov 1966D/D PRO/NCB/6/1202

Performance of Tirbach grains (ex Coed Bach Washery) in a Small Gravity Feed Appliance (1105/66/A215) Oct 1966D/D PRO/NCB/6/1203

The Performance of Avon Washed Nuts (ex. Maesteg) on a Stool Bottom Grate (1104/66/A214) Oct 1966D/D PRO/NCB/6/1204

Performance of Wernos Grains in a Small Gravity Feed Appliance (1100/66/A212) Oct 1966D/D PRO/NCB/6/1205

Performance of Gurnos Grains washed at Wernos Washery in a Small Gravity Feed Appliance (1099/66/A211) Oct 1966D/D PRO/NCB/6/1206

The effect of weathering upon the Smoke Emission properties of M.H.T. briquettes (1098/66/A210) Oct 1966D/D PRO/NCB/6/1207

Smoke Emission from M.H.T. briquettes manufactured at the Crown Fuel Works, Cardiff (1097/66/A209) Oct 1966D/D PRO/NCB/6/1208

An Investigation into the effect of change in nominal size of Anthracite French Nuts upon the water heating efficiency of an Aga S.F. 50 boiler (1096/66/A208) Sep 1966D/D PRO/NCB/6/1209

Performance of Emlyn Tip Grains ex. Brynlliw Washery in a Small Gravity Feed Boiler (1094/66/A207) Sep 1966D/D PRO/NCB/6/1210

Performance of Pontyates Big Vein coal (ex. Coed Bach Washery) in a Small Gravity Feed Appliance (1093/66/A206) Sep 1966D/D PRO/NCB/6/1211

Wernos Washery Trials (1092/66/1) Sep 1966D/D PRO/NCB/6/1212

Draft Report on the probability of gravimetric smoke tests on Multiheat (1091/66/A205) Sep 1966D/D PRO/NCB/6/1213

Smoke Emission from M.H.T. Briquettes manufactured at the Crown Fuel Worksx , Cardiff (1090/66/A204) Sep 1966D/D PRO/NCB/6/1214

Performance of Ogmore Washed Nuts in a Stool Bottom Grate (1089/66/A203) Aug 1966D/D PRO/NCB/6/1215

Performance of Abercrave Middle Vein coal (ex. Abernant Washery) in a Small Gravity Feed Appliance (1088/66/A202) Aug 1966D/D PRO/NCB/6/1216

Test Report on the Davey Mark 2 Room heater with high output boiler (1087/66/A201) Aug 1966D/D PRO/NCB/6/1217

Smoke Emission from M.H.T. Briquettes manufactured at the Crown Fuel Works, Cardiff (1086/66/A200) Aug 1966D/D PRO/NCB/6/1218

Great Mountain - Rubbish Tips - 6.7.66 (1084/66/1) Aug 1966D/D PRO/NCB/6/1219

Performance of Nantgarw coke grains in a small gravity feed appliance (1082/66/A199) Jul 1966D/D PRO/NCB/6/1220

Yniscedwyn Colliery Rubbish Tips (1081/66/1) Jul 1966D/D PRO/NCB/6/1221

Ystrad Fawr (Yniscedwyn) Rubbish Tips (1080/66/1) Jul 1966D/D PRO/NCB/6/1222

The Suitability of Avenue Sunbrite Coke Beans for the Trianco F 90 Gravity Feed Boiler (1079/66/A198) Jul 1966D/D PRO/NCB/6/1223

Morlais R.O.M. - Distribution of Dirt (1077/66/1) Jul 1966D/D PRO/NCB/6/1224

Rotting of Conveyor Belting Underground Hanging Trials (1076/66/1) Jun 1966D/D PRO/NCB/6/1225

The effect of an increase in top size of the washed grains product upon general performance in a gravity feed appliance (1075/66/A197) Jun 1966D/D PRO/NCB/6/1226

Performance of Dunraven (6 Ft seam) washed grains in a samll Gravity Feed Appliance (1074/66/A196) Jul 1966D/D PRO/NCB/6/1227

Smoke Emission from M.H.T. Briquettes manufactured at the Crown Works, Cardiff (10773/66/A195) Jul 1966D/D PRO/NCB/6/1228

Varteg - Ystalyfera Tips (1072/66/1) Jul 1966D/D PRO/NCB/6/1229

Performance of Abercrave (Middle Vein) grains in a Small Gravity Feed Appliance (1071/66/A194) Jun 1966D/D PRO/NCB/6/1230

Open Fire Tests on Samples of National Washed Nuts (1070/66/A193) Jun 1966D/D PRO/NCB/6/1231

Cynheidre Washery (1069/66/1) Jun 1966D/D PRO/NCB/6/1232

Pentremawr Rubbish Tips (1067/66/1) Jun 1966D/D PRO/NCB/6/1233

Realisation Test on Treforgan R.O.M. at Abernant Colliery (1066/66/1) Jun 1966D/D PRO/NCB/6/1234

Wernos Middlings (1065/66/1) Jun 1966D/D PRO/NCB/6/1235

Brynlliw - Mixed Duff (1064/66/1) Jun 1966D/D PRO/NCB/6/1236

Performance of Maesgwyn 18 Ft. Grains (ex. Aberpergwm Washery) in a small gravity feed appliance (1063/66/A192) Jun 1966D/D PRO/NCB/6/1237

Performance of Lower-Felin Grains in a Small Gravity Feed Appliance (1062/66/A191) Jun 1966D/D PRO/NCB/6/1238

Smoke Emission from M.H.T. briquettes manufactured at Crown Fuel Works, Cardiff (1061/66/A190) Jun 1966D/D PRO/NCB/6/1239

Morlais Rubbish Tip - Yield of Coal (1060/66/1) Jun 1966D/D PRO/NCB/6/1240

Abernant Washery - French Nuts (1059/66/1) May 1966D/D PRO/NCB/6/1241

Brynlliw Washery - Duff Extraction (1058/66/1) May 1966D/D PRO/NCB/6/1242

Number not usedD/D PRO/NCB/6/1243

Yniscedwyn Colliery - Surface Lands (1057/66/1) May 1966D/D PRO/NCB/6/1244

Test Report on the Aga G.F. 125B Gravity Feed Boiler (1056/66/A189) May 1966D/D PRO/NCB/6/1245

Performance of crushed Phurnacite in a Small Gravity Feed Appliance (1055/66/A188) May 1966D/D PRO/NCB/6/1246

Performance of Gloda Grains in a Small Gravity Feed Appliance (1054/66/A187) May 1966D/D PRO/NCB/6/1247

Performance of Tirbach Grains (ex. Coedbach Washery) in a Small Gravity Feed Appliance (1053/66/A186) May 1966D/D PRO/NCB/6/1248

Smoke Emission from M.H.T briquettes manufactured at the Crown Fuel Works, Cardiff (1052/66/A185) May 1966D/D PRO/NCB/6/1249

Cynheidre. Prevention of River Pollution - April, 1966 (1051/66/1) Apr 1966D/D PRO/NCB/6/1250

Pentremawr Colliery - Unidentified Seam Sample Taken in Gate Road of B.W.2 District - 31st March, 1966 (1050/66/1) Apr 1966D/D PRO/NCB/6/1251

Test Wash of Opencast Coal at Wernos Washery 10 X 0 Ex. Banwen Disposal Centre. Date of Test 17th March, 1966 (1049/66/1) Apr 1966D/D PRO/NCB/6/1252

Pentremawr - Run-Of-Mine Tests Big Vein and Lower Pumpquart Seams. Sampled 22nd and 23rd March, 1966 (1048/66/1) Apr 1966D/D PRO/NCB/6/1253

Smoke Emission from M.H.T. Briquettes manufactured at the Crown Fuel Works, Cardiff (1047/66/A184) Apr 1966D/D PRO/NCB/6/1254

Treforgan - Run-Of-Mine Test. Sampled 14th & 15th March, 1966 (1046/66/1) Mar 1966D/D PRO/NCB/6/1255

Cwmgwili Colliery - Identification of Unknown Seam (1045/66/1) Mar 1966D/D PRO/NCB/6/1256

Performance of Gurnos Grains (ex Wernos Washery) in a Small Gravity Feed Appliance (1043/66/A182) Mar 1966D/D PRO/NCB/6/1257

Analysis of M.H.T Briquettes manufactured at Crown Fuel Works Cardiff (1044/66/A183) Mar 1966D/D PRO/NCB/6/1258

Further test results - Unifa 63 with boiler. Addendum to Report No. 1042/66/A181. Mar 1966D/D PRO/NCB/6/1259

Further test results - Linco Super K5 Convector Heater. Addendum to Report No.1041/66/A180. Mar 1966D/D PRO/NCB/6/1260

Annual Report 1965 (1040/66/1) Mar 1966D/D PRO/NCB/6/1261

Multiheat Ovoids. Suggested Control Test for Smoke Measurement (1039/66/A179) Mar 1966D/D PRO/NCB/6/1262

Performance of the Trianco F.90 Production Prototype Gravity Feed Boiler, Under Maximum, Rated and Low Load Conditions (1038/66/A178) Mar 1966D/D PRO/NCB/6/1263

Abernant Colliery. The Yield of sized products from the E3 face worked by a B.J.D. Shearer (1229/67/W.W.) Dec 1967D/D PRO/NCB/6/1264

The suitability of Tower Peas in the Trianco Gravity Feed Boiler (1228/67/A293) Dec 1967D/D PRO/NCB/6/1265

Abernant Colliery. Investigation of the yield of sized products from S1 face - Anderson Boyes H.D. Longwall Trepanner (1227/67/W.W.) Dec 1967D/D PRO/NCB/6/1266

Smoke Emission from Multiheat Briquettes manufactured at the Crown Fuel Works, Cardiff (1226/67/A292) Dec 1967D/D PRO/NCB/6/1267

The Comparison of Multiheat, Roomheat and Homefire manufactured briquettes as suitable open fire fuels (1225/67/A291) Nov 1967D/D PRO/NCB/6/1268

Smoke Emission from Multiheat Briquettes manufactured at the Crown Fuel Works Cardiff (1224/67/A290) Nov 1967D/D PRO/NCB/6/1269

Performance of Natural and Manufactured Fuels in the Firemaster 35 5-Star roomheater with extra High Output Boiler (1223/67/A289) Nov 1967D/D PRO/NCB/6/1270

Mrs. M. Scott (deceased), 40 Belmont Rise, Sutton, Surrey (1222/67/A288) Nov 1967D/D PRO/NCB/6/1271

Cwmgwili Colliery. Air Analysis (1221/67/W.W.) Oct 1967D/D PRO/NCB/6/1272

Blending of Gloda Washed Duff with Blaenant Smalls (1220/67/W.W.) Oct 1967D/D PRO/NCB/6/1273

Performance of Kentish Fire briquettes in the Aga SF. 50 (1219/67/A287) Oct 1967D/D PRO/NCB/6/1274

Brynlliw Colliery. Transfer Shock Recorder Tests on the Skip (1217/67/W.W)) Oct 1967D/D PRO/NCB/6/1275

Analysis of Commercially Disposable and Saleable Products (1216/67/W.W.) Oct 1967D/D PRO/NCB/6/1276

Duff in Pentremawr Colliery Culm to Cynheidre Washery. Preliminary Report (1215/67/W.W.) Oct 1967D/D PRO/NCB/6/1277

Conclusion of Tailings. First Report (1214/67/W.W.) Oct 1967D/D PRO/NCB/6/1278

Abernant Colliery. Investigation of the yields of sized products from S1 Face. Anderson Boyes H.D. Longwall Trepanner (1213/67/W.W.) Oct 1967D/D PRO/NCB/6/1279

Performance of Anthracite Grains from Wellington Licensed Mine (1212/67/A286) Oct 1967D/D PRO/NCB/6/1280

Performance of Kent Coals in the Aga S.F.50 closed boiler (1211/67/A285) Oct 1967D/D PRO/NCB/6/1281

Performance of Cottage Hall O/C. site grains in a small gravity feed boiler (1209/67/A284) Oct 1967D/D PRO/NCB/6/1282

Murton Methodist Church - Central Heating (1208/67/A283) Oct 1967D/D PRO/NCB/6/1283

Cynheidre. Minor Incident - P.12 - 21st. September, 1967. Summary of Results (1207/67/W.W.) Oct 1967D/D PRO/NCB/6/1284

Cefn Coed. Minor Incident N face - 26th. September, 1967. Summary of Results (1206/67/W.W.) Oct 1967D/D PRO/NCB/6/1285

Smoke Emission from Multiheat Briquettes manufactured at the Crown Fuel Works, Cardiff (1205/67/A282) Oct 1967D/D PRO/NCB/6/1286

Brynlliw Colliery. Transfer Shock Recorder Tests on the Skip (1204/67/W.W.) Sep 1967D/D PRO/NCB/6/1287

Abernant Colliery. Investigation of the yield of sized products from the W3 and E3 faces (1203/67/W.W.) Sep 1967D/D PRO/NCB/6/1288

Fuel from Lamp Room - Abernant Colliery (1202/67/W.W.) Sep 1967D/D PRO/NCB/6/1289

Blaenant Colliery. Seam Samples - Aug/Sept., 1967 (1201/67/W.W.) Sep 1967D/D PRO/NCB/6/1290

Test Report on the Firemaster 35 5-Star Roomheater with High Output Boiler ( Sep 1967D/D PRO/NCB/6/1291

The Performance of Wyndham Housecoal in the Stool Bottom Grate (1199/67/A282) Sep 1967D/D PRO/NCB/6/1292

Performance of Garw Housecoal in the Stool Bottom Grate (1198/67/A279) Sep 1967D/D PRO/NCB/6/1293

Smoke Emission from Multiuheat Briquettes manufactured at the Crown Fuel Works, Cardiff (1197/67/A278) Sep 1967D/D PRO/NCB/6/1294

Performance of Coegnant District samples in the Stool Bottom Grate (1196/67/A277) Sep 1967D/D PRO/NCB/6/1295

Test results on a sample of National Large Nuts in the Stool Bottom Grate (1195/67/A276) Marked Not distributed. Mr Cooks Instruction. Duplicate a few copies - keep on files." Aug 1967D/D PRO/NCB/6/1296

National Nuts (1194/67/A275) Aug 1967D/D PRO/NCB/6/1297

Test Results on a sample of National Large Nuts in the Stool Bottom Grate (1193/67/A274) Aug 1967D/D PRO/NCB/6/1298

Test Results on three samples of National Large Nuts in the Stool Bottom Grate (1192/67/A273) Aug 1967D/D PRO/NCB/6/1299

Smoke Emission from Multiheat Briquettes manufactured at the Crown Fuel Works, Cardiff (1191/67/A272) Aug 1967D/D PRO/NCB/6/1300

Briquetting of Anthracite Fines with Celoband Adhesives. Third Report, August, 1967 (1190/67/W.W) Aug 1967D/D PRO/NCB/6/1301

Test results on a sample of National Large Nuts in the Stool Bottom Grate (1187/67/A271) Jul 1967D/D PRO/NCB/6/1302

Test Results of a sample of National Large Nuts in the Stool Bottom Grate (1186/67/A270) Jul 1967D/D PRO/NCB/6/1303

Test Results of a sample of National Large Nuts in the Stool Bottom Grate (1185/67/A269) Jul 1967D/D PRO/NCB/6/1304

Test Results of a sample of National Large Nuts in the Stool Bottom Grate (1184/67/A268) Jul 1967D/D PRO/NCB/6/1304 a

Test Results of a sample of National Large Nuts in the Stool Bottom Grate (1183/67/A267) Jul 1967D/D PRO/NCB/6/1305

Test Results of a sample of National L. Nuts in the Stool Bottom Grate (1182/67/A266) Jul 1967D/D PRO/NCB/6/1306

Analysis of Commercially Disposable and Saleable Products, September 1966 - March 1967 (1181/67/1) Jul 1967D/D PRO/NCB/6/1307

Test results of a sample of National Large Nuts on the Stool Bottom Grate (1180/67/A265) Jul 1967D/D PRO/NCB/6/1308

Test results of a sample of National Large Nuts in the Stool Bottom Grate (1179/67/A264) Jul 1967D/D PRO/NCB/6/1309

Performance of Petroleum Coke in a Small Gravity Feed Boiler (1178/67/A263) Jul 1967D/D PRO/NCB/6/1310

Test Results on the Trianco F45 Gravity Feed Boiler. Jul 1967D/D PRO/NCB/6/1311

Aberpergwm Washery. Screening Results of Combined (Aberpergwm, Blaengwrach and Opencast) Raw Feed (8%) After Primary Crusher to Chance Washer (1176/67/1) Jul 1967D/D PRO/NCB/6/1312

Smoke Emission from Multiheat Briquettes manufactured at the Crown Fuel Works, Cardiff (1175/67/A261) Jul 1967D/D PRO/NCB/6/1313

Test results of a sample of National Large Nuts on the Stool Bottom Grate (1174/67/A260) Jul 1967D/D PRO/NCB/6/1314

Testing of natural draught Roomheaters with and without boilers designed to burn small Anthracite (1173/67/A259) Jul 1967D/D PRO/NCB/6/1315

Performance of St Johns District Samples in the Stool Bottom Grate (1172/67/A258) Jun 1967D/D PRO/NCB/6/1316

Performance of Roomheat in the Ideal Tristan Roomheater (1171/67/A257) Jun 1967D/D PRO/NCB/6/1317

Performance of Caerau District Samples in the Stool Bottom Grate (1170/67/A256) Jun 1967D/D PRO/NCB/6/1318

Cynheidre Colliery. An Assessment of Degradation of coal caused by the Retarder Scraper Conveyor in Cross Measure 2. April, 1967. Jun 1967D/D PRO/NCB/6/1319

The Performance of National Large Nuts in the Stool Bottom Grate (1168/67/A255) Jun 1967D/D PRO/NCB/6/1320

Smoke Emission from M.H.T. Briquettes manufactured at thre Crown Fuel Works, Cardiff. Jun 1967D/D PRO/NCB/6/1321

Derivation of the Flue Loss Formulae for closed appliances when burning Anthracite, Welsh Dry Steam and manufactured fuels (1166/67/A253) May 1967D/D PRO/NCB/6/1322

Pentremawr Colliery. Underground Fire - 16th May, 1967 in B.V. 12 Face of Big Vein (1164/67/1) May 1967D/D PRO/NCB/6/1323

Analysis of Slurries (1163/67/1) May 1967D/D PRO/NCB/6/1324

Tests on the Ventilheat (1162/67/A252) May 1967D/D PRO/NCB/6/1325

Brochure for Ventilheat Warm Air Central Heating. 1966D/D PRO/NCB/6/1326

Performance of Lady Windsor 5 Ft and 9 Ft Seams in the Stool Bottom Grate (1161/67/A251) May 1967D/D PRO/NCB/6/1327

Cwmgwili Colliery. Identification of Seam - Probably Gras (1160/67/1) May 1967D/D PRO/NCB/6/1328

Cynheidre Colliery. Report of Analytical Results following fire at Cynheidre on 3rd May, 1967 in the No.3 Panel of Cross Measure 2 (1159/67/1) May 1967D/D PRO/NCB/6/1329

Instructions for Servicing Boilers (1158/67/A250) May 1967D/D PRO/NCB/6/1330

The Performance of National 9 Seams and 6 Seam in the Stool Bottom Grate (1157/67/A249) May 1967D/D PRO/NCB/6/1331

Performance of Natural and Manufactured Fuels in the Ideal Tristan (1156/67/A248) May 1967D/D PRO/NCB/6/1332

Smoke Emission from Multiheat Briquettes manufactured at the Crown Fuel Works, Cardiff (1155/A247) May 1967D/D PRO/NCB/6/1333

Cynheidre Colliery. Seam - Big Vein, Run-of-Mine Tests (1154/67/1) May 1967D/D PRO/NCB/6/1334

The Performance of Penallta, Bargoed and Britannia Large in the Stool Bottom Grate (1153/67/A246) Apr 1967D/D PRO/NCB/6/1335

Annual Report, 1966 (1152/67/1) Apr 1967D/D PRO/NCB/6/1336

Cynheidre Colliery. An assessment of coal degradation at the underground transfer points (1151/67/1) Apr 1967D/D PRO/NCB/6/1337

Smoke Emission from M.H.T Briquettes manufactured at the Crown Fuel Works, Cardiff (1150/67/A245) Apr 1967D/D PRO/NCB/6/1338

Performance of natural and manufactured fuels in the Chatelaine 87 (Househeater) (1148/67/A244) Mar 1967D/D PRO/NCB/6/1339

The Performance of International Washed Cobbles in a Stool Bottom Grate (1147/67/A243) Mar 1967D/D PRO/NCB/6/1340

Smoke Emission from "Roomheat" manufactured fuel (Inter-laboratory check tests) (1146/67/A242) Mar 1967D/D PRO/NCB/6/1341

Performance of Ogmore Washed Nuts in a Stool Bottom Grate (1145/67/A241) Mar 1967D/D PRO/NCB/6/1342

Briquetting of Anthracite Fines with Cellobond Adhesives.Second Report, March, 1967 (1144/67/1) Mar 1967D/D PRO/NCB/6/1343

The Performance of Ogmore Washery Washed Cobbles in a Stool Bottom Grate (1143/67/A240) Mar 1967D/D PRO/NCB/6/1344

Cynheidre Washed Duff for use in the preparation of Active Carbon (1142/67/1) Mar 1967D/D PRO/NCB/6/1345

Abercrave Colliery. Seam - Middle Vein (1141/67/1) Mar 1967D/D PRO/NCB/6/1346

Smoke Emission from M.H.T. Birquettes manufactured at the Crown Fuel Works, Cardiff (1140/67/A239) Mar 1967D/D PRO/NCB/6/1347

Performance of Phurnacite, Multiheat and Nord de Gilly briquettes in the Crane 20A domestic boiler (1139/67/A238) Feb 1967D/D PRO/NCB/6/1348

Performance of Tirbach grains (No.1 rider Seam) ex Coed Bach Washery in a Small Gravity Feed Boiler (1138/67/A236) Feb 1967D/D PRO/NCB/6/1349

Cynheidre Washery - Allocation of Proceeds (1136/67/1) Feb 1967D/D PRO/NCB/6/1350

Beekay CF/120/90 Boiler (1135/67/A235) Feb 1967D/D PRO/NCB/6/1351

Pwllbach Colliery Tips (1134/67/1) Feb 1967D/D PRO/NCB/6/1352

Smoke Emission from M.H.T. Briquettes manufactured at the Crown Fuel Works, Cardiff (1133/67/A234) Feb 1967D/D PRO/NCB/6/1353

Brynlliw Colliery. An Assessment of Coal Degradation at Underground Transfer Points (1132/67/1) Mar 1967D/D PRO/NCB/6/1354

Brynlliw - Degradation of Coal through Skip and Bradford Breaker (1131/67/1) and Brynlliw Colliery Degradation by Skip Winding, Date of Test 26.8.61 (641/61/1) Feb 1967 and Sep 1961D/D PRO/NCB/6/1355a-b

The Performance of Wyndham Colliery Seam Samples in the Stool Bottom Grate (1130/67/A233) Feb 1967D/D PRO/NCB/6/1356

Analysis of Commercially Disposable and Saelable Products, September, 1966 (1129/67/1) Jan 1967D/D PRO/NCB/6/1357

Performance of Aberpergwm Washery Grains in a Small Gravity Feed Appliance (1128/67/A232) Jan 1967D/D PRO/NCB/6/1358

Further Test Work on the Trianco F.120 Gravity Feed Boiler (1127/67/A231) Jan 1967D/D PRO/NCB/6/1359

Cynheidre Colliery. Run-Of-Mine - Big Vein (1126/67/1) Jan 1967D/D PRO/NCB/6/1360

Performance of South Wales coals in glass fronted roomheaters. Part 1: Davey, Torglow D and Lofire 105 roomheaters with boilers (1125/67/A230) Jan 1967D/D PRO/NCB/6/1361

The Briquetting of Anthracite Fines with Celobond Adhesives. First report - January, 1967 (1124/67/1) Jan 1967D/D PRO/NCB/6/1362

Report on the heating and flue systems in use at the home of the late D. J. Donovan of Yniswen, Penycae, in relation to carbon monoxide poisoning (1123/67/A229) Jan 1967D/D PRO/NCB/6/1363

The Performance of Banwen Rice in small gravity feed boilers (1122/67/A228) Jan 1967D/D PRO/NCB/6/1364

Smoke Emission from M.H.T Briquettes manufactured at the Crown Fuel Works, Cardiff (1121/67/A227) Jan 1967D/D PRO/NCB/6/1365

Performance of Avon and Penaber Washed Products (1120/67/A226) Jan 1967D/D PRO/NCB/6/1366

Cynheidre Colliery. Run-Of-Mine - Big Vein (1119/67/1) Jan 1967D/D PRO/NCB/6/1367

Theoretical Flue Gas Temperature (1118/66/A225) Dec 1967D/D PRO/NCB/6/1368

Performance of Penallta Cobbles on a Stool Bottom Grate (1117/66/A224) Dec 1967D/D PRO/NCB/6/1369

Derivation of the Flue Loss Formulae for Closed Appliances When Burning Anthracite (1116/66/A223) Dec 1967D/D PRO/NCB/6/1370

Performance of Lower Brass Vein Coal in a Small Gravity Feed Boiler (1115/66/A222) Dec 1967D/D PRO/NCB/6/1371

Smoke Emission from M.H.T briquettes manufactured at the Crown Fuel Works, Cardiff (1114/66/A221) Dec 1967D/D PRO/NCB/6/1372

Smoke Emission from Multiheat Briquettes from the Crown Plant, Cardiff (1336/69/A350) May 1969D/D PRO/NCB/6/1373

Blaengwrach Colliery. Saleable Yield R.O.M. at Aberpergwm Washery May 1969 (1335/69/WW) May 1969D/D PRO/NCB/6/1374

Aberpergwm Washery. Washing tests - April 1969 (1334/69/WW) May 1969D/D PRO/NCB/6/1375

Performance of Aberpergwm Washery Grains in a Small Gravity Feed Boiler (1333/69/A349) Apr 1969D/D PRO/NCB/6/1376

The Performance of West Wales Area Housecoal samples on the Stool Bottom Grate (1332/69/A348) Apr 1969D/D PRO/NCB/6/1377

Treforgan Colliery. Degradation of coal through loading bunker, April 1969 (1331/69/WW) Apr 1969D/D PRO/NCB/6/1378

Morlais Colliery. Swansea Five Feet Seam (1329/69/WW) Apr 1969D/D PRO/NCB/6/1379

Smoke Emission from Multiheat Briquettes from the Crown Plant, Cardiff (1328/69/A346) Apr 1969D/D PRO/NCB/6/1380

Aberpergwm Colliery. R.O.M. on coal from 18Ft Seam, April 1969 (1327/69/WW) Apr 1969D/D PRO/NCB/6/1381

The Performance of Avenue Coke Beans in the Foresight AB Roomheater. Further Test Results (1326/69/A345) Apr 1969D/D PRO/NCB/6/1382

The Suitability of Anthracite Beans from various sources for the Foresight AB Roomheater (1325/69/A344) Apr 1969D/D PRO/NCB/6/1383

Information about the Foresight AB Roomheater (1292/68/A331) 1968D/D PRO/NCB/6/1384

Mine Air Analysis - Calculations (1323/69/WW) 1969D/D PRO/NCB/6/1385

Abernant Colliery. Size distribution of coal from S3 face using a Hoy drum with shuttle plough (1321/69/WW) Mar 1969D/D PRO/NCB/6/1386

Blaenant. Run-of-Mine 19 - 25th February 1969 (1319/69/WW) Mar 1969D/D PRO/NCB/6/1387

Cwmgwili Colliery. Comparison of Hoy Point-attack picks with conventional radial picks on a Hoy Continuous Miner. March 1969 (1322/69/WW) Apr 1969D/D PRO/NCB/6/1388

Smoke Emission from Multiheat Briquettes from the Crown Plant, Cardiff (1317/69/A343) Mar 1969D/D PRO/NCB/6/1389

The Performance of Avenue Coke Beans in the Foresight AB Roomheater (1316/69/A342) Feb 1969D/D PRO/NCB/6/1390

Blaenant Colliery. Sizing and Ash of R.O.M. Sampled 2nd December, 1968. Feb 1969D/D PRO/NCB/6/1391

The Performance of Caerau Seam Samples in the Stool Bottom Grate (1314/69/A341) Feb 1969D/D PRO/NCB/6/1392

Analysis of Commercially Disposable and Saleable Products, January - June 1968 (1313/69/WW) Jan 1969D/D PRO/NCB/6/1393a-b

Blaenant Untreated Smalls. Period 3rd to 7th February and 10th to 14th February (1312/69/WW) Feb 1969D/D PRO/NCB/6/1394

Smoke Emission from Multiheat Briquettes from the Crown Plant, Cardiff (1311/69/A340) Feb 1969D/D PRO/NCB/6/1395

The Performance of Lady Windsor 7 Ft. Seam Sample in the Stool Bottom Grate (1310/69/A339) Feb 1969D/D PRO/NCB/6/1396

Brynlliw Washery. Sizing Tests on overflow from Duo sieves - 30.1.69 (1309/69/WW) Feb 1969D/D PRO/NCB/6/1397

Abernant Colliery. Size distribution of coal from S3 face using Anderton Disc with Hoy Picks (1308/69/WW) Feb 1969D/D PRO/NCB/6/1398

Brynlliw Washery. Use of Sedomax F to aid flocculation and decrease moisture of filter cake (1307/69/WW) Jan 1969D/D PRO/NCB/6/1399

Report on discussion held at Coal House, Harrow, by P.G. Smith Esq., J, Harrison, Esq., (Research and Development) and R.G. Jones, Esq., on 20.1.69 (1306/69/WW) Jan 1969D/D PRO/NCB/6/1400a-b

Analysis of Commercially Disposable and Saleable Products January - June 1968 (1303/69/WW) Feb 1969D/D PRO/NCB/6/1401

Brynllliw Colliery - Volatile Matter Examination of Seams (1305/69/WW) Jan 1969D/D PRO/NCB/6/1402

Cynheidre Middlings Sampled 3rd and 6th January, 1969 (1304/69/WW) Jan 1969D/D PRO/NCB/6/1403

Smoke Emission from Multiheat Briquettes from the Crown Plant, Cardiff (1302/68/A338) Jan 1969D/D PRO/NCB/6/1404

Filter Coal Plant, Cwmdu Laboratory. Brief Review of Operations 1968 (1301/69/WW) Jan 1969D/D PRO/NCB/6/1405a-b

Saleable of Cwmgwili Colliery - R.O.M (1300/68/WW) Dec 1968D/D PRO/NCB/6/1406

Performance of Coedbach Washery Grains in a Small Gravity Feed Boiler (1299/68/A337) Dec 1968D/D PRO/NCB/6/1407

Cwmgwili Colliery H District, November, 1968. Difference in degradation between seven and nine chains on a Joy Continuous Miner (1298/68/WW) Dec 1968D/D PRO/NCB/6/1408

Smoke Emission from Multiheat Briquettes from the Crown Plant, Cardiff (1297/68/A336) Dec 1968D/D PRO/NCB/6/1409

Licensed Mine Anthracite Grains - J. Williams and Son (1296/68/A335) Nov 1968D/D PRO/NCB/6/1410

The Performance of Taff Merthyr Nuts in a closed domestic Appliance (1295/68/A334) Nov 1968D/D PRO/NCB/6/1411

Smoke emission from Multiheat briquettes from the Crown Plant, Cardiff (1294/68/A333) Nov 1968D/D PRO/NCB/6/1411a

Test Report on the Fobrux 1797 Free-standing solid fuel convector heater (1293/68/A332) Oct 1968D/D PRO/NCB/6/1412

The Performance of Royal Arms O/C site Washed Nuts in the Stool Bottom Grate (1291/68/A330) Oct 1968D/D PRO/NCB/6/1413

The Performance of Coegnant 6 Ft. Seam Samples in the Stool Bottom Grate (1290/68/A329) Oct 1968D/D PRO/NCB/6/1414

Investigation into the suitability of Anthracite Beans for the Romesse No.2 Stove (1289/68/A328) Oct 1968D/D PRO/NCB/6/1415

The Performance of Multiheat in the Crane 20A Domestic Closed Boiler (1288/68/A327) Oct 1968D/D PRO/NCB/6/1416

The Performance of Phurnacite containing 50% Anthracite Duff in the Crane 20A (1287/68/A326) Oct 1968D/D PRO/NCB/6/1417

Smoke emission from Multiheat Briquettes manufactured at the Crown Plant, Cardiff (1286/68A325) Oct 1968D/D PRO/NCB/6/1418

The Performance of proposed Opencast Housecoal from the Royal Arms (Merthyr) Site in the Stool Bottom Grate (1285/68/A324) Oct 1968D/D PRO/NCB/6/1419

The Performance of Wyndham/Western Upper 9 Ft. Seam Housecoal in the Stool Bottom Grate (1284/68/A323) Sep 1968D/D PRO/NCB/6/1420

The Performance of Deep Navigation Nuts in a closed Domestic Appliance (1283/68/A322) Sep 1968D/D PRO/NCB/6/1421

Smoke Emission from Multiheat Briquettes manufactured at the Crown Fuel Works, Cardiff (1282/68/A321) Sep 1968D/D PRO/NCB/6/1422

Survey of Tailings/Reject Wet Fires Disposal (1281/68/WW) Sep 1968D/D PRO/NCB/6/1423

The Development of the Foresight Dragon Anthracite Bean Burning Appliance (1280/68/A320) Sep 1968D/D PRO/NCB/6/1424

Abernant Colliery. % Duff in R.O.M. from S1 Face. A rapid method for the determination of duff (-3/16 material) in R.O.M (1279/68/WW) Sep 1968D/D PRO/NCB/6/1425

Soil Mechanics Testing Programme Aberpergwm Colliery (1278/68/WW) Aug 1968D/D PRO/NCB/6/1426

Oiling of Washed Duff at Abernant Washery (1276/68/WW) Aug 1968D/D PRO/NCB/6/1427

Blaenant R.O.M (1275/68/WW) Aug 1968D/D PRO/NCB/6/1428

The Performance of Maesteg Washery Housecoal Nuts in the Stool Bottom Grate (1274/68/A319) Aug 1968D/D PRO/NCB/6/1429

Smoke emission from Multiheat briquettes from the Crown Plant Cardiff (1273/68/A318) Aug 1968D/D PRO/NCB/6/1429a

Test Report on "Foresight Dragon" Roomheater with high output boiler (1272/68/A317) Jul 1968D/D PRO/NCB/6/1430

Aberpergwm Washery Spoil and Spoil Heap. First Report (1271/68/WW) Jul 1968D/D PRO/NCB/6/1431

The performance of Taff Merthyr Nuts in a Closed Domestic Appliance (1270/68/A316) Jul 1968D/D PRO/NCB/6/1432

Interim report on the Development of an Inset Glass Fronted Roomheater designed to burn Anthracite Beans. (1269/68/A315) Jul 1968D/D PRO/NCB/6/1433

Smoke Emission from Multiheat Briquettes manufactured at the Crown Fuel Works, Cardiff (1268/68/A314) Jul 1968D/D PRO/NCB/6/1434

Performance of Multiheat prepared with and without a Bituminous coal blend in the Crane 20A closed domestic boiler (1267/68/A313) Jul 1968D/D PRO/NCB/6/1435

Cynheidre Stove Nuts. An examination of the size of the nuts after transporting to Milford Haven by rail and then discharging at sales yard after transportation by Charrold Lorry - 18th June, 1968 (1265/68/WW) Jun 1968D/D PRO/NCB/6/1436

Brynlliw Washery. Examination of products produced from each of Brynlliw Pit and Graig Merthyr culms - March 1968 (1264/68/WW) Jun 1968D/D PRO/NCB/6/1437

Smoke Emission from Multiheat Briquettes manufactured at the Crown Fuel Works, Cardiff (1262/68/A312) Jun 1968D/D PRO/NCB/6/1438

Wernos Washery. Cwmgwili, Lindsay and Pantyffynon coals, sampled April, 1968 (1261/68/WW) Jun 1968D/D PRO/NCB/6/1439a-b

Performance of Aberpergwm Washery Grains in a Small Gravity Feed Boiler (1260/68/A311) May 1968D/D PRO/NCB/6/1440

Performance of Ogilvie Cobbles and Nuts on the open fire (1259/68/A310) May 1968D/D PRO/NCB/6/1441

Performance of Glynglas O/C Site (Stanllyd Seam) grains in a Small Gravity Feed Boiler (1257/68/A309) May 1968D/D PRO/NCB/6/1442

Smoke emission from Multiheat Briquettes manufactured at the Crown Fuel Works, Cardiff (1255/68/A308) May 1968D/D PRO/NCB/6/1443

Abernant Colliery R.O.M. S2 Face Demonstration Face (1256/68/WW) May 1968D/D PRO/NCB/6/1444

Performance of Oakdale Nuts in a Fan-assisted Inset Open Fire (1254/68/A307) Apr 1968D/D PRO/NCB/6/1445

Performance of Phurnacite containing Anthracite Duff (1253/68/A306) Apr 1968D/D PRO/NCB/6/1446

Analysis of Commercially Disposable and Saleable Products, October 1967 - January 1968 (1252/68/WW) Apr 1968D/D PRO/NCB/6/1447

Smoke Emission from Multiheat Briquettes manufactured at the Crown Fuel Works, Cardiff (1251/68/A305) Apr 1968D/D PRO/NCB/6/1448

Performance of Markham Nuts in Fan-Assisted inset Open Fires (1250/68/A304) Mar 1968D/D PRO/NCB/6/1449

Treforgan Colliery. Degradation caused by the surface installation (1248/68/WW) Mar 1968D/D PRO/NCB/6/1450

Scientific Department Lecture The Role of Scientific Department in the Study of Soil Machanics, Tip Stability and Associated Problems on the subject of Spoil Tips and Lagoons - the training of industrial staff (1247/68/WW) Mar 1968D/D PRO/NCB/6/1451

The Preparation and Blending of Coals for the Central Electricity Generating Board (1246/68/WW) Mar 1968D/D PRO/NCB/6/1452

The Performance of Ogilvie Boiler Nuts in a Closed Domestic Appliance (1249/68/A303) Mar 1968D/D PRO/NCB/6/1453

Treforgan Colliery. Duffs from R1 Face (1245/68/WW) Mar 1968D/D PRO/NCB/6/1454

Smoke Emission from Multiheat Briquettes manufactured at the Crown Fuel Works, Cardiff (1244/68/A302) Mar 1968D/D PRO/NCB/6/1455

Arsenic in Anthracite Grains and Peas (1243/68/WW) Mar 1968D/D PRO/NCB/6/1456

The Performance of Ogilvie Boiler Nuts in a closed Domestic Appliance (1242/68/A301) Feb 1968D/D PRO/NCB/6/1457

Amassheat Powerpack Fanned Warm Air Unit with Domestic Hot Water Boiler (1241/68/A300) Feb 1968D/D PRO/NCB/6/1458

Report on performance of Boiler at Oystermouth School (1240/68/A299) Feb 1968D/D PRO/NCB/6/1459

Filter Coal Plant. Cwmdu Laboratory. Brief Review of Operations, 1967 (1238/68/WW) Feb 1968D/D PRO/NCB/6/1460

Further Test Work - Unifa 63 with boiler. Second Addendum to Report No. 1042/66/A181 (1237/68/A298) Feb 1968D/D PRO/NCB/6/1461

Smoke Emission from Multiheat Briquettes manufactured at Crown Fuel Works, Cardiff (1236/68/A297) Feb 1968D/D PRO/NCB/6/1462

N.C.B. Lands at Old Tareni Colliery (1235/68/WW) Jan 1968D/D PRO/NCB/6/1463

Performance of Natural and Manufactured Fuels in Glass-fronted Roomheaters (1234/68/A296) Jan 1968D/D PRO/NCB/6/1464

The Davey Underfloor-draught Inset Roomheater (1233/68/A295) Jan 1968D/D PRO/NCB/6/1465

Treforgan Colliery. Duffs from the R1 and R2 Faces (1232/68/WW) Jan 1968D/D PRO/NCB/6/1466

Smoke Emission from Multiheat Briquettes manufactured at the Crown Fuel Works, Cardiff (1231/68/A294) Jan 1968D/D PRO/NCB/6/1467

Brynlliw Colliery. Swansea Six and Three Feet Seams. Volatile Matter (1230/67/WW) Dec 1967D/D PRO/NCB/6/1468

Smoke emission from Multiheat Briquettes from the Crown Plant, Cardiff (1417/70/A368) Jul 1970D/D PRO/NCB/6/1469

The Performance of Nanthra briquettes imported from France. 1416/70/D.F. 16) Jul 1970D/D PRO/NCB/6/1470

Treforgan Colliery. Red Vein Seam, 26th June, 1970 (1415/70/WW) Jul 1970D/D PRO/NCB/6/1471

Tips at Onllwyn. Aerial Ropeway Tips (Old Section) (1414/70/WW) Jul 1970D/D PRO/NCB/6/1472

Suitability of various West Wales Area Anthracite grain products for the S.A.S.S. market (1412/70/DF.14) Jun 1970D/D PRO/NCB/6/1473

Ammanford Run-of-Mine February 1970 (1411/70/WW) Jun 1970D/D PRO/NCB/6/1474

Wernos Washery (Test Wash). Cwmgwili and Ammanford coals (1410/70/WW) Jun 1970D/D PRO/NCB/6/1475

The performance of Anthralit briquettes imported from France (1409/70/DF13) Jun 1970D/D PRO/NCB/6/1476

Performance of Anthraclair briquettes imported from France (1408/70/DF12) May 1970D/D PRO/NCB/6/1477

Smoke emission from Multiheat Briquettes from the Crown Plant, Cardiff (1407/70/A367) May 1970D/D PRO/NCB/6/1478

Cynheidre Coal Preparation Plant Pegson Breakers - April 1970 (1406/70/WW) May 1970D/D PRO/NCB/6/1479

Pentremawr Colliery. Big Vein Seam. BV14 Face and BW2A Face, 11th and 12th November, 1969 (1405/70/WW) May 1970D/D PRO/NCB/6/1480

Morlais Colliery. Swansea 5 Ft. Seam, S3 Gate Stable, 20th January 1970 (1404/70/WW) May 1970D/D PRO/NCB/6/1481

Brynlliw Colliery. Swansea 6 Ft. Seam. S19 Gate Stable - 17th December 1969, S19 Face - 7th January 1970, s19 Gate Stable - 27th February 1970, S17 Gate Stable - 17th December 1969 (1403/70/WW) May 1970D/D PRO/NCB/6/1482

Treforgan Colliery. Red Vein Seam, R2 and R6 Gate Stable, 20th and 21st Oictober 1969 (1402/70/WW) May 1970D/D PRO/NCB/6/1483

Blaengwrach Colliery. Six Feet Seam, S16 Face, 17th October 1969 (1401/70/WW) May 1970D/D PRO/NCB/6/1484

Blaenant Colliery. Rhondda No.2 Seam. 102 Face (L.H.S) and Face Gate Road, 10th October 1969 (1400/70/WW) May 1970D/D PRO/NCB/6/1485

Aberpergwm Colliery. Eighteen Feet Seam, No 7 Main Heading and No. A6 Main Heading, 8th and 9th October 1969 (1399/70/WW) May 1970D/D PRO/NCB/6/1486

Scientific Department Emergency Service, May 1970 (1398/70/WW). Includes names, addresses and telephone numbers for Scientific Department Personnel, Area and Colliery Officials and East Wales Scientific Department. Apr 1970D/D PRO/NCB/6/1487

Suitability of various West Wales Area Anthracite grains products for the S.A.S.S. market (1397/70/DF.11) Apr 1970D/D PRO/NCB/6/1488

Memorandum detailing allocation of sampling strength, both in terms of the number of people sampling coal and the number of shifts worked, at collieries in the West Wales area (1396/70/WW) Apr 1970D/D PRO/NCB/6/1489

Old Empire Tip - Blaengwrach (1395/WW) Apr 1970D/D PRO/NCB/6/1490

Treforgan Colliery. Run-of-Mine to loading bunker (1394/70/WW) Apr 1970D/D PRO/NCB/6/1491-1492

The Performance of West Wales Area Housecoals on the Stool Bottom Grate (1393/70/DF.10) Mar 1970D/D PRO/NCB/6/1493

Smoke emission from Multiheat Briqettes from the Crown Plant, Cardiff (1392/70/A366) Mar 1970D/D PRO/NCB/6/1494

An Investigation into the Ideal Tristan Roomheater (1390/70/A365) Feb 1970D/D PRO/NCB/6/1495

An Investigation into the Ideal Tristan Roomheater. ADDENDUM (1390/70/A365) Aug 1970D/D PRO/NCB/6/1496

Addendum to Report No. 1390/70/A365. An Investigation into the Ideal Tristan Roomheater. Jun 1970D/D PRO/NCB/6/1497

Third Addendum to Report No. 1390/70/A365. An Investigation into the Ideal Tristan Roomheater. Oct 1970D/D PRO/NCB/6/1498

Blaenant Old Colliery, Jan. 1970, Two Disused Colliery Waste Tips (1389/70/WW) Feb 1970D/D PRO/NCB/6/1499

Memorandum and attached plan relating to Old Blaenant Colliery Dec 1969D/D PRO/NCB/6/1500

Pentremawr. Coal at Coedbach Washery - Test Wash 23.1.70 (1388/70/WW) Feb 1970D/D PRO/NCB/6/1501

Brynlliw Mixed Duff supplied to Carmarthen Bay Power Station (1387/70/WW) Feb 1970D/D PRO/NCB/6/1502

Treforgan Colliery. Size distribution of coal in run-of-mine 4th/5th December, 1969. Jan 1970D/D PRO/NCB/6/1503

Brynlliw Washery. Mixed Duff - January 1970 (1385/70/WW) Jan 1970D/D PRO/NCB/6/1504

Performance of Tirbach O/C Grains ex. G.C.G. Washery in a Small Domestic Gravity Feed Boiler (1384/70/DF9) Jan 1970D/D PRO/NCB/6/1505

Cwmgwili Colliery. Stanllyd Seam - Run-of-Mine Sampled 27th and 28th November 1969 (1383/70/WW) Jan 1970D/D PRO/NCB/6/1506

Memorandum formerly attached to the Report on Old Blaenant Colliery. Dec 1969D/D PRO/NCB/6/1507

The Performance of Coegnant 6 Ft. Seam Housecoal on the Stool Bottom Grate (1382/70/DF.8) Jan 1970D/D PRO/NCB/6/1508

Smoke Emission from Multiheat briquettes from the Crown Plant, Cardiff (1381/69/A364) Dec 1969D/D PRO/NCB/6/1508a

Self-Rescuers - Withdrawn from Service, West Wales Area (1380/69/WW) Dec 1969D/D PRO/NCB/6/1509

Cynheidre Coal Preparation Plant. Pegson Breakers - November 1969 (1379/69/WW) Dec 1969D/D PRO/NCB/6/1510

Coal Breaker Tests - November, 1969. Banwen Washery (1378/69/WW) Dec 1969D/D PRO/NCB/6/1511 a-b

Coegnant Colliery. Lower Seven Feet Seam. Examination of two seam sections. Samples Taken - 18th September 1969 (1377/69/WW) Dec 1969D/D PRO/NCB/6/1512

Steer Tip, G.C.G. Examination for recoverable coal (1376/69/WW) Nov 1969D/D PRO/NCB/6/1513

The Performance of Phurnacite containing 20% Anthracite Duff in the Crane 20A (1375/69/A363) Nov 1969D/D PRO/NCB/6/1514

The Performance of St Johns 9 Ft. seam housecoal on the Stool Bottom Grate (1374/69/DF.7) Nov 1969D/D PRO/NCB/6/1515

Coal Breaker Tests - October 1969. Comparison of yields from breaking large coal by pneumatic picks and B.M. sizer (1373/69/WW) Nov 1969D/D PRO/NCB/6/1516

Smoke emission from Multiheat Briquettes from the Crown Plant, Cardiff (1372/69/A372) Nov 1969D/D PRO/NCB/6/1517

The Performance of Brynlliw Stovesse Nuts (1½ R x 5/8 R) (1371/69/DF.6) Oct 1969D/D PRO/NCB/6/1518

Cynheidre Coal Preparation Plant - Pegson Breakers - October 1969 (1370/69/WW) Oct 1969D/D PRO/NCB/6/1519

Coal Breaker Tests - October 1969. Comparison of Results from Kue-Ken Breaker Single Stage and Two Stage breaking (1369/69/WW) Oct 1969D/D PRO/NCB/6/1520

Coal Breaker Tests - Oct. 1969. B.J.D. Single Roll Breaker (1368/69/WW) Oct 1969D/D PRO/NCB/6/1521

Breakage of coal as discharged into coal cellar. Cynheidre French Nuts - October, 1969 (1367/69/WW) Oct 1969D/D PRO/NCB/6/1522

Smoke Emission from Multiheat Briquettes from the Crown Plant, Cardiff (1366/69/A361) Oct 1969D/D PRO/NCB/6/1523

Abernant - Smokeless Fuel Plant. Information for design purposes (1364/69/WW) Oct 1969D/D PRO/NCB/6/1524

Blaenant Untreated Smalls - Volatile Matter (1363/69/WW) Sep 1969D/D PRO/NCB/6/1525

Blaenant Untreated Smalls. Periods 17th to 21st February and 24th to 28th February (1318/69/WW) Sep 1969D/D PRO/NCB/6/1526

Performance of Tirbach O/C Grains ex G.C.G. Washery in a Small Gravity Feed Boiler (1362/69/DF.5) Sep 1969D/D PRO/NCB/6/1527

Smoke Emission from Multiheat Briquettes from the Crown Plant, Cardiff (1361/69/A360) Sep 1969D/D PRO/NCB/6/1528

An investigation into the Redfyre Plus 5 Roomheater with normal output boiler (1360/69/A359) Sep 1969D/D PRO/NCB/6/1528a

Breaker Tests. Comparison between Ku-Ken, Pegson and Norton Pick Breakers in crushing Maesgwyn Large (1359/69/WW) Sep 1969D/D PRO/NCB/6/1529

Brynlliw Washery. Mixed Duff - Ash Contents - 1969 (1358/69/WW) Sep 1969D/D PRO/NCB/6/1530

Brynlliw - Raw Smalls Mixture - 14.8.69 (1357/69/WW) Sep 1969D/D PRO/NCB/6/1531

Smoke Emission from Multiheat Briquettes from the Crown Plant, Cardiff (1356/69/A358) Aug 1969D/D PRO/NCB/6/1532

Hargrove Grindability Index of Anthracite and Dry Steam Washed Duffs and Filter Coal (1355/69/WW) Aug 1969D/D PRO/NCB/6/1533

Brynlliw - Raw Smalls Mixture, 13.8.69 (1354/69/WW) Aug 1969D/D PRO/NCB/6/1534

Analysis of Commercially Disposable and Saleable Products - Anthracite and Dry Steam Coals April 1969 (1353/69/WW) Aug 1969D/D PRO/NCB/6/1535

Analysis of Commercially Disposable and Saleable Products - Anthracite Washed Products - Opencast - April 1969 (1352/69/WW) Aug 1969D/D PRO/NCB/6/1536a-b

The Performance of Mardy Nuts in closed boilers and the Stool Bottom Grate (1351/69/A357) Jul 1969D/D PRO/NCB/6/1537

Smoke Emission from Multiheat Briquettes from the Crown Plant, Cardiff (1349/69/A355) Jul 1969D/D PRO/NCB/6/1537a

Performance of Washed Anthracite Grains from Mineral Supplies Ltd (1347/69/DF.4) Jul 1969D/D PRO/NCB/6/1538

Comparison of the performance of Cynheidre and Banwen/G.C.G., O/C Beans in the Foresight AB Roomheater (1348/69/A354) Jul 1969D/D PRO/NCB/6/1539

Sizing of Cynheidre Stove Nuts (1346/69/WW) Jul 1969D/D PRO/NCB/6/1540

Performance of grains product from test washings at Wernos Washery (1345/69/DF.3) Jun 1969D/D PRO/NCB/6/1541

Performance of Washed Anthracite grains from Wellington Licensed Mine (1344/69/DF.2) Jun 1969D/D PRO/NCB/6/1542

Performance of Aberpergwm Washery Grains in a Small Domestic Gravity Feed Boiler (1343/69/DF.1) Jun 1969D/D PRO/NCB/6/1543

Cynheidre Washery. Precipitation of solids in Thickener (1342/69/WW) Jun 1969D/D PRO/NCB/6/1544

Testing of the Conway Widevein No.1 Roomheater (1341/69/A353) Jun 1969D/D PRO/NCB/6/1545

Performance of grains product from test washings at Coedbach Washery (1340/69/A352) Jun 1969D/D PRO/NCB/6/1546

Smoke Emission from Multiheat Briqettes from the Crown Plant, Cardiff (1339/69/A351) May 1969D/D PRO/NCB/6/1547

Brynlliw Colliery. Seam Section of S18 Face in Swansea Six Feet Seam. Sampled - 30th April 1969 (1338/69/WW) Jun 1969D/D PRO/NCB/6/1548

Blaenant Colliery. No. 2 Rhondda Seam. Faces 36, 38 and 101 (1337/69/WW) Jun 1969D/D PRO/NCB/6/1549

Testing of Prefabricated Insulated Chimneys (1499/72/A392) Mar 1972D/D PRO/NCB/6/1550

The Redfyre Plus 8 Automatic Roomheater (1498/72/A391) Mar 1972D/D PRO/NCB/6/1551

Wernos Washery - Cwmgwili Coal (Test Wash) (1497/72/W.R.L.) Jan 1972D/D PRO/NCB/6/1552

Sample of Stock 1B Grains - Performance assessment for S.A.S.S (1496/72/DF29) Jan 1972D/D PRO/NCB/6/1553

Anthracite Sand Filtration Conference held at the University of Reading 3rd - 5th January 1972 (1495/72/WW) Jan 1972D/D PRO/NCB/6/1554

Smoke Emission from Multiheat Briquettes from the Crown Plant, Cardiff (1494/72/A390) Jan 1972D/D PRO/NCB/6/1555

Analysis of Commercially Disposable and Saleable Products. Anthracite Opencast Coals (1493/71/WRL) Jan 1972D/D PRO/NCB/6/1556

Analysis of Comercially Disposable and Saleable Products. Anthracite Coals (1492/71/WRL) Jan 1972D/D PRO/NCB/6/1557

Assessment of firecement samples supplied by S.B Johnson (Ceramic Consultant) (1491/71/A389) Dec 1971D/D PRO/NCB/6/1558

Seam Analysis - Morlais Colliery. Swansea 5 Feet Seam. Sampled - October 1971, November 1971 (1490/71/WRL) Dec 1971D/D PRO/NCB/6/1559

Lewis Merthyr - Stocks of Washed Tip Coal - December 1971 (1489/71/WRL) Dec 1971D/D PRO/NCB/6/1560

Licensed Opencast Washed Anthracite Grains. Five Transport Co. Ltd (1488/71/DF.28) Dec 1971D/D PRO/NCB/6/1561

Seam Analysis - Brynlliw Colliery. Seams - Swansea 3 Feet, Swansea 6 Feet, Sampled - 27th October 1971, 3rd November 1971 (1487/71/WRL) Dec 1971D/D PRO/NCB/6/1562

Smoke Emission from Multiheat Briquettes from the Crown Plant, Cardiff (1483/71/A387) Oct 1971D/D PRO/NCB/6/1563

Treforgan Colliery. Run-of-Mine August 1971 (1481/71/WW) Oct 1971D/D PRO/NCB/6/1564

Brynlliw Washery - August 1971 (1479/71/WW)) Oct 1971D/D PRO/NCB/6/1565

The performance of Multiheat in the Crane 20A Domestic Boiler (1478/71/A386) Sep 1971D/D PRO/NCB/6/1566

Test Report on Everglow 1/44 Roomheater with High Output Boiler (1477/71/A385) Sep 1971D/D PRO/NCB/6/1567

Test report on Torglow Trend No.1 (Series II) Inset Roomheater with High Output Boiler (Metric Units) (1474/71/A382) Aug 1971D/D PRO/NCB/6/1568

The performance of Phurnacite in the Crane 20A Domestic Boiler (1476/71/A384) Sep 1971D/D PRO/NCB/6/1569

Smoke Emission from Multiheat Briquettes from the Crown Plant, Cardiff (1475/71/A383) Sep 1971D/D PRO/NCB/6/1570

Open Fire performance of Multiheat in an improved grate with different bottomgrate air spacings (1473/71/A381) Jul 1971D/D PRO/NCB/6/1571

Smoke emission from Multiheat briquettes manufactured at the Crown plant, Cardiff (1472/71/A380) Jul 1971D/D PRO/NCB/6/1572

The Performance of Phurnacite in the Crane 20A domestic boiler (1471/71/A379) Jun 1971D/D PRO/NCB/6/1573a-b

The Performance of a selection of East Wales Area housecoals in the Stool Bottom Grate (1469/71/DF.26) Jun 1971D/D PRO/NCB/6/1574

Treforgan Colliery. Size Distribution from R4 and R6 Faces, using Anbauhobel and Gleithhobel ploughs respectively (1468/71/WW) May 1971D/D PRO/NCB/6/1575

The Performance of Phurnacite in the Crane 20A domestic boiler (1466/71/A378) May 1971D/D PRO/NCB/6/1576

Smoke emission from Multiheat Briquettes from the Crown Plant, Cardiff (1465/71/A377) May 1971D/D PRO/NCB/6/1577

Washery Tests at Abernant. Results of washing Abernant and Treforgan coals separately during March 1971 (1464/71/WW) May 1971D/D PRO/NCB/6/1578

Cefn Coed Dump (alongside main line) (1463/71/WW) Apr 1971D/D PRO/NCB/6/1579

Wernos Washery (Test Wash) Ammanford Coal (1462/71/WW) Apr 1971D/D PRO/NCB/6/1580

Loss of Coal from Washeries to Rubbish Tips (1461/71/WW) Apr 1971D/D PRO/NCB/6/1581

Steer and other Tips - G.C.G. Steer - Examination for recoverable coal. March 1971 (1460/71/WW) Mar 1971D/D PRO/NCB/6/1582

The Performance of Gorllwyn Seam (Mardy) housecoal on the Stool Bottom Grate (1459/71/DF.25) Mar 1971D/D PRO/NCB/6/1583

Wernos Washery (Test Wash). Cwmgwili Coal (1458/71/WW) Mar 1971D/D PRO/NCB/6/1584

Seam Analysis - Brynlliw Colliery. Swansea Six Feet Seam - South Drivage. Sampled 3rd March 1971 (1457/71/WW) Mar 1971D/D PRO/NCB/6/1585

Seam Analysis - Treforgan Colliery, Red Vein Seam, S1 Drivage. Sampled 15th February 1971 (1456/71/WW) Mar 1971D/D PRO/NCB/6/1586

Smoke emission from Multiheat Briquettes from the Crown Fuel Works, Cardiff (1455/71/A376) Mar 1971D/D PRO/NCB/6/1587

The Performance of Gurnos O/C Grains in a Small Domestic Gravity Feed Boiler (1454/71/DF.24) Mar 1971D/D PRO/NCB/6/1588

Onllwyn Tips. Sampled February 1971 (1453/71/WW) Mar 1971D/D PRO/NCB/6/1589a-b

Seam Analysis - Blaenant. Rhondda No.2 Seam - Sampled Jan 1971. Faces: 40, 102, 103 (1451/71/WW) Feb 1971D/D PRO/NCB/6/1590

Licensed Mine Washed Anthracite Grains - J. Williams and Sons (1450/71/DF.23)D/D PRO/NCB/6/1591

The Performance of Mardy Washed Nuts on the Stool Bottom Grate and in a Glass Fronted Roomheater (1449/71/DF.22) Feb 1971D/D PRO/NCB/6/1592

Cefn Coed Tips, February 1971 (1448/71/WW) Feb 1971D/D PRO/NCB/6/1593 a-c

Performance of Tirbach O/C Anthracite Grains in a Small Domestic Gravity Feed Boiler (1447/70/DF.21)D/D PRO/NCB/6/1594

Seam Analysis - Blaengwrach Colliery. Seam - Unknown (since Identified as Peacock). 9 Feet District, 9Ft. Return heading. Sampled 11th January 1971 (1446/71/WW) Feb 1971D/D PRO/NCB/6/1595

Seam Analysis - Treforgan Colliery. Seam: Red Vein, Faces: R4, R6 and South Intake heading. Sampled: July and September 1970 (1445/71/WW) Feb 1971D/D PRO/NCB/6/1596

Great Mountain Tips. Sampled 23rd January 1971 (1444/71/WW) Feb 1971D/D PRO/NCB/6/1597

The Performance of Phurnacite containing 10% Char in the Crane 20A boiler (1443/71/A375) Feb 1971D/D PRO/NCB/6/1598

Seam Analysis - Brynlliw Colliery. Six Feet Seam. S21 Face. Sampled 21st January 1971 (1442/71/WW) Feb 1971D/D PRO/NCB/6/1599

An Investigation into the Carbon Dioxide content of Anthracite Stove Nuts following a complaint from Kent (1441/71/WW) Feb 1971D/D PRO/NCB/6/1600

Smoke Emission from Multiheat Briquettes from the Crown Plant, Cardiff (1440/70/A374) Dec 1970D/D PRO/NCB/6/1601

Analysis of Commercially Disposable and Saleable Products - Anthracite and Dry Steam Coals Opencast - November 1970 (1439/70/WW) Dec 1970D/D PRO/NCB/6/1602

Seam Analysis - Graig Merthyr Colliery. Swansea 3 Ft and 6 Ft Seams. Sampled May/June 1970 (1438/70/WW) Dec 1970D/D PRO/NCB/6/1603

Analysis of Commercially Disposable and Saleable Products. Anthracite and Dry Steam Coal. November 1970 (1437/70/WW) Dec 1970D/D PRO/NCB/6/1604

Seam Analysis - Treforgan Colliery. Red Vein Seam. R5 Face and South Intake. Sampled 15th May and 5th October 1970 (1436/70/WW) Dec 1970D/D PRO/NCB/6/1605

Seam Analysis - Cwmgwili Colliery. Big Seam - Sampled March 1970 (1435/70/WW) Nov 1970D/D PRO/NCB/6/1606

Seam Analysis - Brynlliw Colliery, Six Feet Seam. S18, S19, S20 S21 Faces. Sampled 22-25th September 1970 (1434/70/WW) Nov 1970D/D PRO/NCB/6/1607

The Performance of Coegnant and St Johns housecoal on the Stool Bottom Grate (1433/70/DF.20) Nov 1970D/D PRO/NCB/6/1608

Smoke Emission from Multiheat Briquettes from the Crown Plant Cardiff (1432/70/A373) Nov 1970D/D PRO/NCB/6/1609

Aberpergwm Washed Products, Sept. 1970 (1431/70/WW) Nov 1970D/D PRO/NCB/6/1610

Experimental Briquettes manufactured by Thyssen (Gt Britain) Ltd (1429/70/DF.19) Oct 1970D/D PRO/NCB/6/1611

The Performance of Lady Windsor Housecoal on the Stool Bottom Grate (1428/70/A371) Oct 1970D/D PRO/NCB/6/1612

Performance of Blaengwrach and Aberpergwm Grains in a Small Domestic Gravity Feed Boiler (1427/70/DF.18) Oct 1970D/D PRO/NCB/6/1613

Cwmgwili Colliery. Analysis of the Working Faces at Cwmgwili for inherent ash content. 20/21 August 1970 (1426/70/WW) Sep 1970D/D PRO/NCB/6/1614

Smoke Emission from Multiheat Briquettes from the Crown Plant, Cardiff (1425/70/A370) Sep 1970D/D PRO/NCB/6/1615

Investigations being carried out by Mr. R.G. Jones, up to July 1970. 1 Extrusion of tailings with small experimental press. 2 Cement making from tailings. 3 Cement stabilised discard strips at Cwmdu (1424/70/WW) Aug 1970D/D PRO/NCB/6/1616

Brynlliw Mixed Duff. Automatic Control of Filter Coke to Mixture (1423/70/WW) 1970D/D PRO/NCB/6/1617

Run-of-Mine of Stanllyd Seam at Cwmgwili, Febuary 1970 (1422/70/WW) Aug 1970D/D PRO/NCB/6/1618

The CIMVA - RAM Block Press (1421/70/WW) Aug 1970D/D PRO/NCB/6/1619

The Performance of Phurnacite in the Crane 20A Boiler (1420/70/A369) Aug 1970D/D PRO/NCB/6/1620

The Performance of Nanthra briquettes imported from France (1419/DF.17) Aug 1970D/D PRO/NCB/6/1621

Seam Analysis - Ammanford Colliery, Wigan Seam. 100 Face - 10 yds from Gate Heading. 11B Face - 4yds up face from Supply Heading (1418/70/WW) Jul 1970D/D PRO/NCB/6/1622

Anthracite Washed Duff - Test for Stability etc. in connection with the loss of the Lovat (SW/75/1617) Jul 1975D/D PRO/NCB/6/1623

Manvers Production Sunbrite Doubles (1616/75/A417) 1975D/D PRO/NCB/6/1624

The Swansea Six Feet Seam at Brynlliw Colliery (1578/74/SW) Jan 1974D/D PRO/NCB/6/1625

The Swansea Five Feet Seam at Morlais Colliery (1577/74/SW) Jan 1974D/D PRO/NCB/6/1626

Brynlliw Colliery - Six Feet Seam, Seam Sections S25 & S26 Faces, also the effect of Swansea Six Feet and Three Feet coal on the ash content of the dry duff mixture (1576/74/SW) Dec 1973D/D PRO/NCB/6/1627

Anthrite Briquetted Fuel Manufactured by Thyssen Limited (1574/73/DF.60) Nov 1973D/D PRO/NCB/6/1628

The Performance of Phurnacite in the Crane 20A Boiler (1573/73/A406) Nov 1973D/D PRO/NCB/6/1629

Seam Encountered in the Cross Measure Five Driveage, 660 Level at Cynheidre No. 3 and 4 Colliery (1572/73/SW) Oct 1973D/D PRO/NCB/6/1630

The Performance of Phurnacite in the Crane 20A Boiler (1571/73/A405) Oct 1973D/D PRO/NCB/6/1631

The Red Vein Seam at Treforgan Colliery (1570/73) Oct 1973D/D PRO/NCB/6/1632

Table of commercially disposable and saleable products for the twelve months ended 31 March 1973 (1569/73/SW) 1973D/D PRO/NCB/6/1633

The Red Vein Seam at Treforgan Colliery (1567/73/SW) Sep 1973D/D PRO/NCB/6/1634

Smoke Emission from Multiheat Briquettes from the Crown Plant, Cardiff (1566/73/A403) Aug 1973D/D PRO/NCB/6/1635

The Performance of Phurnacite and Multiheat in the Crane 20a Boiler (1565/73/A402) Jul 1973D/D PRO/NCB/6/1636

Smoke Emission from Multiheat Briquettes from the Crown Plant Cardiff (1564/73/A401) Jul 1973D/D PRO/NCB/6/1637

Warmback No.6 Back Boiler Unit with Queenette No.56 Mk II 16 inset fire (1615/75/A416) Jun 1975D/D PRO/NCB/6/1638

Bottom Door Discharge of Steel Wagons at Swansea Docks (SW/75/1614) May 1975D/D PRO/NCB/6/1639

Temperature Survey of Esse Elan 320 Firebars (1613/75/DF.68) May 1975D/D PRO/NCB/6/1640

Cynheidre 3. Four Feet and Upper Six Feet, Big Vein (1612/75/SW) May 1975D/D PRO/NCB/6/1641

The Performance of Penallta Washed Nuts on the Stool Bottom Grate (1611/75/DF.67) May 1975D/D PRO/NCB/6/1642

The Performance of Phurnacite in the Crane 20A Boiler (1610/75/A415) May 1975D/D PRO/NCB/6/1643

Abernant. Exposure in South East Lateral Driveage, E269922, N206164 (1609/75/SW) 1975D/D PRO/NCB/6/1644

Domestic Market Suitability Test on a Sample of Coedbach Grains (1608/75/DF.66) May 1975D/D PRO/NCB/6/1645

Hardgrove Grindability Index and Ash Characteristics of Coals Supplied to P.F. Stations of CEGB (1607/75/SW) Apr 1975D/D PRO/NCB/6/1646

The Performance of Lady Windsor Cobbles and Nuts on the Stool Bottom Grate (1605/75/DF.65) Apr 1975D/D PRO/NCB/6/1647

Domestic Market Suitability Tests on Samples of Washed Beans and Grains from Stockpiles at Gwaun-Cae-Gurwen Washery (1604/75/DF.64) Apr 1975D/D PRO/NCB/6/1648

Torglow Trend No.1 Roomheater (Without Intersecting Flue) (1603/75/A414) Mar 1975D/D PRO/NCB/6/1649

Abernant Colliery. Size Distribution of Coal from the E9 Face (1602/75/SW) Mar 1975D/D PRO/NCB/6/1650

Smoke Emission Tests on Briquette Samples Submitted by Thyssen (G.B.) Limited (1601/75/DF.63) Feb 1975D/D PRO/NCB/6/1651

Clydach Merthyr Colliery, Swansea Two Feet, Maes Melyn Seam (1600/75/SW) Jan 1975D/D PRO/NCB/6/1652

Abernant Colliery - January 1975. E9 Size Distribution of Coal (1599/75/SW) 1975D/D PRO/NCB/6/1653

The Performance of Phurnacite in the Crane 20A Boiler (1598/75/A413) Feb 1975D/D PRO/NCB/6/1654

The Swansea Six Feet Seam and the Swansea Three Feet Seam at Brynlliw Colliery (SW.1597/74) Dec 1974D/D PRO/NCB/6/1655

Abernant Colliery - November 1974. E8 Face (12 Large Pieces, Type Sl7), Comparison of Results with Previous Tests from E8 and SE1 Faces (1496/74/SW) 1974D/D PRO/NCB/6/1656

Cmwgwili Colliery. Upper 9 Ft and 4 Ft and Upper 6 Ft, Stannllyd and Big Vein. Seam Samples taken by Mr Ashleigh Bryan on the instruction of the Colliery Manager (SWL 1595/74) 1974D/D PRO/NCB/6/1657

Domestic Market Suitability Tests on Samples of Industrial Washed Beans from Stockpile at Coedbach (1594/74/DF.62) Oct 1974D/D PRO/NCB/6/1658

Domestic Market Suitability Tests on Samples of Washed Grains from Stockpile at Coedbach (1593/74/DF.61) Oct 1974D/D PRO/NCB/6/1659

Blending of Anthracite Grains (1592/74/A412) Oct 1974D/D PRO/NCB/6/1660

The Performance of Phurnacite in the Crane 20A Boiler (1591/74/A411) Sep 1974D/D PRO/NCB/6/1661

Abernant Colliery, Red Vein (1590/74/SW) Sep 1974D/D PRO/NCB/6/1662

Blending of Anthracite Grains (1589/74/A410) Aug 1974D/D PRO/NCB/6/1663

Blaenant Colliery, No.2 Rhondda Seam (1588/74/SW) Jul 1974D/D PRO/NCB/6/1664

Abernant Colliery. SE.1 and E.8 Faces and Comparison of Size Distribution (Drum Change), May 1974 (1587/74/SW) Jun 1874D/D PRO/NCB/6/1665

Abernant Colliery, Red Vein (1586/74/SW) Jun 1974D/D PRO/NCB/6/1666

The No.2 Rhondda Seam at Blaenant Colliery (1585/74/SW) Jun 1974D/D PRO/NCB/6/1667

Cynheidre Colliery, Big Vein (1584/74/SW) Jun 1974D/D PRO/NCB/6/1668

The Swansea Five Feet Seam at Morlais Colliery (1583/74/SW) Jun 1974D/D PRO/NCB/6/1669

The Swansea Six Feet Seam at Brynlliw Colliery (1582/74/SW) May 1974D/D PRO/NCB/6/1670

Cynheidre Colliery. Uncorrelated Seam on 660 Level (1581/74/SW) Apr 1974D/D PRO/NCB/6/1671

The Performance of Phurnacite in the Crane 20A Boiler (1580/74/A409) Jun 1974D/D PRO/NCB/6/1672

Test report on the KAMINOR O72.10 Freestanding solid fuel convector heater (1579/74/A408) Jan 1974D/D PRO/NCB/6/1673

The Stanllyd and Big Vein Seams at Cwmgwili (1559/73/SW) Jun 1973D/D PRO/NCB/6/1674

Blaengwrach Colliery, Six Feet Seam (1558/73/SW) Jun 1973D/D PRO/NCB/6/1675

Graig Merthyr Colliery, Swansea Three Feet Seam (1557/73/SW) Jun 1973D/D PRO/NCB/6/1676

Cwmgwili Test Wash at Wernos (1556/73/SW) May 1973D/D PRO/NCB/6/1677

Anthrite Briquetted Fuel Manufactured by Thyssen Limited (1555/73/DF.59) Mar 197D/D PRO/NCB/6/1678

Warmback No.7 Boiler Unit with Queensway Mark II 18 Open Fire (1554/73/A400) Mar 1973D/D PRO/NCB/6/1679

Analysis of Commercially Disposable and Saleable Products. Anthracite and Dry Steam Coal (1552/73/SW) Feb 1973D/D PRO/NCB/6/1680-1681

Analysis of Commercially Disposable and Saleable Products. Opencast Anthracite and Dry Steam Coal (1551/73/SW) Feb 1973D/D PRO/NCB/6/1682-1683

The Performance of Ogmore Washed Cobbles and Washed Nuts on the Stool Bottom Grate (1550/73/DF.58) Feb 1973D/D PRO/NCB/6/1684 a-b

Abernant - Fuel to Washery (1549/73/SW) Feb 1973D/D PRO/NCB/6/1685

S.A.S.S. Suitability - Tirbach Opencast Ex. Coedbach Washery Grains (6 Samples) (1544/72/DF.56) Dec 1972D/D PRO/NCB/6/1686

Boiler Water Survey (1546/73/SWA) Jan 1973D/D PRO/NCB/6/1687

S.A.S.S. Suitability - Tirbach Grains Ex. G.C.G. Washery (1543/72/DF.55) Dec 1972D/D PRO/NCB/6/1688

S.A.S.S. Suitability - Cynheidre Washery Grains (1541/72/DF.54) Nov 1972D/D PRO/NCB/6/1689

Smoke Emission from Multiheat Briquettes from the Crown Plant, Cardiff (1540/72/A396) Nov 1972D/D PRO/NCB/6/1690

S.A.S.S. Suitability - Tirbach O/C Ex. Coedbach grains (2 samples) (1539/72/DF.53) Nov 1972D/D PRO/NCB/6/1691

Radiation Classification Test Results - Opencast Housecoal Samples (1538/72/DF.52) Oct 1972D/D PRO/NCB/6/1692

The Performance of Phurnacite in the Crane 20A Domestic Boiler (1537/72/A395) Oct 1972D/D PRO/NCB/6/1693

S.A.S.S. Suitability - Tirbach O/C Ex. Coedbach Grains (1536/72/DF.51) Oct 1972D/D PRO/NCB/6/1694

S.A.S.S. Suitability - Cynheidre Washery Grains (1535/72/DF.50) Oct 1972D/D PRO/NCB/6/1695

S.A.S.S Suitability Test - Cynheidre Washery Grains (1534/72/DF.49) Oct 1972D/D PRO/NCB/6/1696

S.A.S.S. Suitability Test - Tirbach Ex. G.C.G. Washery (1533/72/DF.48) Oct 1972D/D PRO/NCB/6/1697

S.A.S.S. Suitability Test - Tirbach Grains Ex. Coedbach (1532/72/DF.47) Oct 1972D/D PRO/NCB/6/1698

Report on the design, construction and development of a Triac Solid State Power Regulator for the temperature control of ash fusion muffles (1531/72/SW) Report also contains notes and hand-drawn diagrams of the Controller and its composition, lists and graphs of performance and commercial lists of ratings. Oct 1972D/D PRO/NCB/6/1699

The Determination of Carbon in Coal using a modification of B.S. Method (1530/72/WRL) Sep 1973D/D PRO/NCB/6/1700a-b

Licensed Production of Washed Anthracite Grains, Five Transport Company Limited (1529/72/DF.46) Sep 1972D/D PRO/NCB/6/1701

S.A.S.S. Suitability Test - Cynheidre Washery Grains (1528/72/DF.45) Sep 1972D/D PRO/NCB/6/1702

The Performance of Taff Merthyr Large Nuts on the Stool Bottom Grate (1527/72/DF.44) Sep 1972D/D PRO/NCB/6/1703

The Performance of Abercynon 9 Ft Seam Housecoal on the Stool Bottom Grate (1526/72/DF.43) Sep 1972D/D PRO/NCB/6/1704

S.A.S.S. Suitability Test - Abernant Washery Grains (1525/72/DF.42) Sep 1972D/D PRO/NCB/6/1705

The Performance of Brynlliw Peas in the Aga GF 45 Gravity Feed Boiler (1524/72/DF.41) Sep 1972D/D PRO/NCB/6/1706

Annual Report - 1972 (1523/72/SW) Sep 1972D/D PRO/NCB/6/1707

"Anthrite" Briquetted Fuel Manufactured by Thyssen Ltd (1522/72/DF.40) Sep 1972D/D PRO/NCB/6/1708

Smoke Emission from Multiheat Briquettes from the Crown Plant, Cardiff (1521/72/A394) Jul 1972D/D PRO/NCB/6/1709

S.A.S.S. Suitability Test - Tirbach Opencast Grains (1520/72/DF39) Jul 1972D/D PRO/NCB/6/1710

Analysis of Commercially Disposable and Saleable Products. Opencast Anthracite and Dry Steam, April 1972 (1519/72/SW) Jul 1972D/D PRO/NCB/6/1711a-b

Analysis of Commercially Disposable and Saleable Products. Anthracite and Dry Steam Coal. April, 1972 (1518/72/SW) Jul 1972D/D PRO/NCB/6/1712

S.A.S.S. Suitability Tests - Tirbach Opencast Grains (1516/72/DF.38) Jul 1972D/D PRO/NCB/6/1713

S.A.S.S. Suitability Tests - Big Vein and Red Vein Washed Grains from Gwaun-Cae-Gurwen Open-Cast Washery (1515/72/DF.37) Jun 1972D/D PRO/NCB/6/1714

S.A.S.S. Suitability Tests -Brynlliw grains (1514/72/DF.36) Jun 1972D/D PRO/NCB/6/1714a

Analysis of Commercially Disposable and Saleable Products. Anthracite Coals (1513/72/WRL) Jun 1972D/D PRO/NCB/6/1715

Analysis of Commercially Disposable and Saleable Products. Opencast Anthracite Coals (1517/17/SW) Jul 1972D/D PRO/NCB/6/1716

Licensed Production of Washed Anthracite Grains - Five Transport Co. Ltd (1512/72/DF.35) Jun 1972D/D PRO/NCB/6/1717

"Anthrite" Briquetted Fuel Manufactured by Thyssen (G.B.) Ltd (1511/72/DF.34) Jun 1972D/D PRO/NCB/6/1718 a-b

Anthrite Briquetted Fuel - Sample Submitted for Laboratory Appliance Test by B.A.C. Limited (1510/72/DF 33) Jun 1972D/D PRO/NCB/6/1719

Licensed Production of Washed Anthracite Grains - Five Transport Co. Ltd (1509/72/DF.32) May 1972D/D PRO/NCB/6/1720-1721

Smoke Emission from Multiheat Briquettes Manufactured at the Crown Plant, Cardiff (1507/72/A393) Apr 1972D/D PRO/NCB/6/1722

Seam Analysis - Cwmgwili Colliery. Stanllydd Seam (1506/72/WRL) Apr 1972D/D PRO/NCB/6/1723

Amendment to Report 1506/72/WRL. Seam Analysis - Cwmgwili Colliery - Stanllyd Seam. Oct 1972D/D PRO/NCB/6/1724

Seam Analysis - Blaenant Colliery. Rhondda No. 2 Seam. Sampled 15 Dec 1971 (1505/72/WRL) Apr 1972D/D PRO/NCB/6/1725

Seam Analysis - Blaengwrach Colliery, Six Feet Seam. Sampled 7th and 8th December 1971 (1504/72/WRL) Apr 1972D/D PRO/NCB/6/1726

Seam Analysis - Abernant Colliery, Red Vein Seam. Sampled 13th, 14th, 17th and 20th December 1971 (1503/72/WRL) Apr 1972D/D PRO/NCB/6/1727

Seam Analysis - Treforgan Colliery, Red Vein Seam. Sampled 17 and 18th November 1971 (1502/72/WRL) Apr 1972D/D PRO/NCB/6/1728

"Anthrite Briquetted Fuel Manufactured by Thyssen (G.B.) Ltd (1501/72/DF.30) Apr 1972D/D PRO/NCB/6/1729

Seam Analysis. Cynheidre 1 and 2 Colliery, Four Feet and Upper Six Feet Seam, Big Vein (1683/79/SW(W)) Jun 1979D/D PRO/NCB/6/1730

Seam Analysis Report. Morlais Colliery, Swansea Five Feet Seam (1682/79/SW) Jun 1979D/D PRO/NCB/6/1731

Seam Analysis Report. Cynheidre 1 and 2 Colliery. Four Feet and Upper Six Feet Seam, Big Vein (1679/79/SW(W)) Jun 1979D/D PRO/NCB/6/1732

Seam Analysis Report. Cynheidre 3 and 4 Colliery, Four Feet and Upper Six Feet Seam, Big Vein (1678/79/SW(W)) Jun 1979D/D PRO/NCB/6/1733

Cynheidre Washery. Float and Sink Analysis of Feed to Washery (1677/79/SW) 1979D/D PRO/NCB/6/1734

Abernant Washery. Float and Sink Analysis Treforgan Crushed R.O.M. Feed to Washery (1676/79) 1979D/D PRO/NCB/6/1735

Abernant Washery. Float and Sink Analysis of Abernant Crushed R.O.M. Feed to Washery (1675/79) 1979D/D PRO/NCB/6/1736

Breakage of Anthracite Large for production of nuts (1674/78/SW) Dec 1978D/D PRO/NCB/6/1737

Aberpergwm Washery. Screening Tests on the Secondary Raw Coal Screen (1673/78/SW) 1978D/D PRO/NCB/6/1738

Seam Analysis Report: Brynlliw Colliery, Swansea Six Feet Seam (1671/78/SW) Nov 1978D/D PRO/NCB/6/1739

Wernos Washery Filtration Rate Test on N/S Drums (1670/78/SW) Nov 1978D/D PRO/NCB/6/1740

Wernos Washery. Float and Sink of Betws Crushed R.O.M (1669/78/SW) Nov 1978D/D PRO/NCB/6/1741

Seam Analysis Report. Blaengwrach Colliery, Six Feet Seam (1668/78/SW) Nov 1978D/D PRO/NCB/6/1742

Table of Commercially Disposable and Saleable Products for the Six Months ending June 1978 (1667/78/SW) 1978D/D PRO/NCB/6/1743

Cynheidre Colliery. Feed to Washery, Float and Sink Test (1666/78/SW) Aug 1978D/D PRO/NCB/6/1744

Seam Analysis Report. Morlais Colliery, Swansea Five Feet and Cornice Seams (1664/78/SW) Jun 1978D/D PRO/NCB/6/1745

Table of Commercially Disposable and Saleable Products for the Six Months ending January 1978 (1663/78/SW) 1978D/D PRO/NCB/6/1746

Slurry - Drainage of a covered stock of slurry at River Neath Wharf (SW/78/1662) Jan 1978D/D PRO/NCB/6/1747

Abernant Colliery. Float and Sink Analysis of Middlings (1661/78) Feb 1978D/D PRO/NCB/6/1748

Table of Commercially Disposable and Saleable Products for the Six Months ending June 1977 (1653/77/SW) Jul 1977D/D PRO/NCB/6/1749

Rapid Ash Measurement: Use of the Lab-X Range of Analysers for the determination of the ash content of coal (1660/78/SW) Nov 1977D/D PRO/NCB/6/1750

Aberpergwm Washery. Aberpergwm and Blaengwrach R.O.M (1658/77/SW) Nov 1977D/D PRO/NCB/6/1751

Determination of Bulk Density of Washed Duff. An Evaluation of the Sweden/Swansea Test Procedures (1657/77) Dec 1977D/D PRO/NCB/6/1752

Blaenant Colliery. Washing Test of Blaenant Coal at Banwen Washery. Float and Sink Analysis of Raw Feeds (1656/77/SW) Nov 1977D/D PRO/NCB/6/1753

The Hwch/Stanllyd Seams and the Big Vein currently being worked at Cwmgwili Colliery (1655/77/SW) Jun 1977D/D PRO/NCB/6/1754

Abernant Colliery. R.O.M. on S9 and S10 Face Comparison of make of duff with Cleidtobel Ploughs (1654/77/SW) 1977D/D PRO/NCB/6/1755 a-b

Table of Commercially Disposable and Saleable Products for the Six Months ending September 1977. 1977D/D PRO/NCB/6/1756

Rapid Ash Measurement: A Feasibility Study on the use of the Telsec Lab-X350 X-Ray Fluorescence Analyser as an Ash Monitor (1652/77/SW) May 1977D/D PRO/NCB/6/1757

The Hwch/Stanllyd and Big Vein Seams currently being worked at Cwmgwili Colliery (1651/77/SW) Jun 1977D/D PRO/NCB/6/1758

Gwaun-Cae-Gurwen Washery Float and Sink Tests on Products Discard and Feed. June/July 1977 (1650/77/SW) Jul 1977D/D PRO/NCB/6/1759

Filtracite. Sales over the period 1965 - March 1977 (1648/77/SW) Apr 1977D/D PRO/NCB/6/1760

Seam Analysis. Abernant Colliery, Red Vein (1647/77/SWL) 1977D/D PRO/NCB/6/1761

Seam Analysis, Aberpergwm Colliery. Six Feet Seam, Eighteen Feet Seam (1646/77/SW) 1977D/D PRO/NCB/6/1762

Seam Analysis, Aberpergwm Colliery. Nine Feet Seam (1645/77/SW) Feb 1977D/D PRO/NCB/6/1763 a-b

Analysis of Inferior Stocks, Etc. Index. 1 Coal in GCG Washery Discard, 2 Onllwyn Washery Fines. 3 Onllwyn Washed Duff (Mixed D/M and O/C). 4 Banwen washed Duff. 5 Maesgwyn B Stock, Filter Coke. 6 Rhyd Seam R.O.M. 7 Rhyd Seam, Sulphur. 8 Summary of Results (1644/77/SW) Oct 1977D/D PRO/NCB/6/1764

Seam Analysis. Blaenant Colliery. No.2 Rhondda Seam (1643/77/SW) Jan 1977D/D PRO/NCB/6/1765

List of N.C.B Sources of Washed Anthracite Duff. 1 Cynheidre Washed Duff, 2 Abernant Washed Duff, 3 Onllwyn Washed Duff, 4 GCG Washed Duff, 5 Coedbach Washed Duff, 6 Banwen Washed Duff, 7 Wernos Washed Duff, 8 Aberpergwm Washed Duff, 9 Carway Washed Duff (1640/76/SW) 1976D/D PRO/NCB/6/1766

Warmback Boiler Unit No. 6 with Queen Fan Fire 16 in. Mk II (1639/A425) 1976D/D PRO/NCB/6/1767

The Performance of Bargoed Cobbles in the Stool Bottom Grate (1638/76/DF.72) Jul 1976D/D PRO/NCB/6/1768

The Performance of Phurnacite in the Crane 20A Boiler (1637/76/A424) Jun 1976D/D PRO/NCB/6/1769

The Performance of Marine Cobbles on the Stool Bottom Grate (1635/76/DF.71) May 1976D/D PRO/NCB/6/1770

Seam Analysis. Cwmdu Colliery. Four Feet and Upper Six Feet Seams, Big Vein (1634/76/SW) Mar 1976D/D PRO/NCB/6/1771

Rainfall and Moisture of Washed Anthracite Duffs at Swansea Docks. 1966 - 1975 (SW/76/1633) Mar 1973D/D PRO/NCB/6/1772

Lovat - Lost Vessel. Anthracite Washed Duff - Collected Results of Shipped Coal, Etc (SW/76/1632) Mar 1976D/D PRO/NCB/6/1773

Test Report. Trianco Housemaster. Roomheater with High Output Boiler (1631/76/A423) Apr 1976D/D PRO/NCB/6/1774

IMCO. Inter-Labroatory Flow Tests - March 1976 (1630/SW/76) Mar 1976D/D PRO/NCB/6/1775

The performance of Phurnacite in the Crane 20A Boiler (1629/76/A422) Mar 1976D/D PRO/NCB/6/1776

The Performance of Oriental, Bargoed and Britannia Cobbles on the Stool Bottom Grate (1628/76/DF.70) Mar 1976D/D PRO/NCB/6/1777

Investigation of Suggested Changes in Anthracite Nut Sizes (1627/76/DF.69) Feb 1976D/D PRO/NCB/6/1778

Test Report. Parkray Everglow. Roomheater with High Output Boiler (1626/76/A421) Jan 1976D/D PRO/NCB/6/1779

Test Report on the Phoenix XL 5000 Anthracite Stove (1625/76/A420) Jan 1976D/D PRO/NCB/6/1780

Transporting of Sized Coal by Means of a small Lorry with Blower Discharge (Charged Vehicle) (1624/75/SW) Sep 1975D/D PRO/NCB/6/1781

Cwmgwili Colliery. Upper Nine Feet Seam (Stanllyd) (1623/SW/75) Oct 1975D/D PRO/NCB/6/1782

Seam Analysis. Aberpergwm Colliery, Red Seam (Cornish) (SW 75/1622) Oct 1975D/D PRO/NCB/6/1783

The Performance of Phurnacite in the Crane 20A Boiler (1621/75/A419) Oct 1975D/D PRO/NCB/6/1784

Approval test report on "Grenville" 16" open fire (1620/75/A4518) Dec 1975D/D PRO/NCB/6/1785

Seam Analysis. Cwmgwili Colliery, Four Ft and Upper Six Ft Seam (Big Vein) (1619/75/SW) Jul1975D/D PRO/NCB/6/1786

Seam Analysis. Treforgan Colliery, Red Vein (1618/75/SW) Jul 1975D/D PRO/NCB/6/1787

Analysis of a section taken on the No.2 Rhondda Seam at Blaenant Colliery. Feb 1982D/D PRO/NCB/6/1788

Blaenant Colliery. Quality Assessment of Run-of-Mine Material (SWL/GC3117/10A/10) Jan 1983D/D PRO/NCB/6/1789

Tower Washery. Test Wash of Merthyr Vale Raw Coal. Float and Sink Analysis (1730/SW/83) Feb 1983D/D PRO/NCB/6/1790

Seam Analysis Report. Cynheidre Colliery, Upper Nine Feet Seam (Gras Uchaf) (1729/SW/82) Sep 1982D/D PRO/NCB/6/1791

Table of commercially disposable and saleable products for the six months ending June 1982 (1725/SW/82) 1982D/D PRO/NCB/6/1792

Seam Analysis Report. Cynheidre Colliery, Four Feet and Upper Six Feet Seam (Big Vein) (1724/SW/82) Apr 1982D/D PRO/NCB/6/1793

Seam Analysis Report. Cynheidre Colliery, Lower Gellideg Seam (Pumpquart) (1723/SW/82) Apr 1982D/D PRO/NCB/6/1794

Use of the Telsec X-ray Fluorescence Analyser for Ash Determination at Onllwyn Laboratory (Addendum to Report Ref No. 1719/81/SW) (1722/81/SW) Mar 1982D/D PRO/NCB/6/1795a-c

Table of commercially disposable and saleable products for the six months ending December 1981 (SW 1721/82) 1982D/D PRO/NCB/6/1796

Cynheidre Colliery. Float and Sink Analysis of Feed to Washery (1720/SW/81) Oct 1981D/D PRO/NCB/6/1797

Use of the Telsec X-Ray Fluorescence Analyser for Ash Determination at Onllwyn Washery (1719/81/SW) Sep 1981D/D PRO/NCB/6/1798a-b

Table of commercially disposable and saleable products for the six months ending June 1981 (1718/SW/81) 1981D/D PRO/NCB/6/1799

Blaenant Colliery. Sizing and Float and Sink Analysis of Run-of-Mine (1717/SW/81) Mar 1981D/D PRO/NCB/6/1800

Table of commercially disposable and saleable products for the six months ending December 1981 (1716/SW/81) 1981D/D PRO/NCB/6/1801

Seam Analysis Report. Brynlliw/Morlais Colliery, Swansea Three Feet Seam (1715/SW/81 (W)) 1981D/D PRO/NCB/6/1802

Seam Analysis Report. Brynlliw/Morlais Colliery, Swansea Five Feet Seam (1714/SW/81 (W)) 1981D/D PRO/NCB/6/1803

Seam Analysis Report. Brynlliw/Morlais Colliery, Swansea Six Feet Seam (1713/SW/81) 1981D/D PRO/NCB/6/1804

Tower Colliery - Quality of R.O.M. Stocks (1712/SW/80) Oct 1980D/D PRO/NCB/6/1805

Tower Colliery. Float and Sink Analysis of Feed to Washery (1711/SW/80) Oct 1980D/D PRO/NCB/6/1806

Abernant Colliery. Float and Sink Analysis of Abernant R.O.M. and feed to Abernant Washery (1710/SW/80) Oct 1980D/D PRO/NCB/6/1807

Cynheidre Drainage Allowances (1709/SW/80) Oct. 1980D/D PRO/NCB/6/1808

Table of commercially disposable and saleable products for the six months ending June 1980 (1707/SW/80) 1980D/D PRO/NCB/6/1809

Brynlliw Colliery. Degradation in Skip Winding (1706/SW/80) Sep 1980D/D PRO/NCB/6/1810

Flow Moisture - variation between batches of Washed Duff when loaded into the same vessel (1704/SW/80) Aug 1980D/D PRO/NCB/6/1811

Tower R.O.M. Dumps. Float and Sink Analysis of Current Dump to Aberpergwm Washery (1701/SW/80) May 1980D/D PRO/NCB/6/1812

Table of commercially disposable and saleable products for the six months ending June 1983 (1733/SW/83) 1983D/D PRO/NCB/6/1813

Fluid Bed Drier - Comparison of Moisture Results with those from Apex Drying Oven (1705/SW/80) Sep 1980D/D PRO/NCB/6/1814

Feed to Washery - Brynlliw (1702/SW/80) May 1980D/D PRO/NCB/6/1815

Information on Anthracite (1700/SW/80) May 1980D/D PRO/NCB/6/1816

Seam Analysis Report. Cynheidre Colliery, Pumpquart Seam (1699/SW/80) May 1980D/D PRO/NCB/6/1817 a-b

Table of commercially disposable and saleable products for the six months ending December 1979 (1698/SW/80) 1980D/D PRO/NCB/6/1818

Filtracite - Sales 1979-80 and Two Previous Years (SW80/1697) Apr 1980D/D PRO/NCB/6/1819

Filtracite - Sales Period 1965-1978 (1697/SW/80) Jun 1978D/D PRO/NCB/6/1820

Blaenant Colliery. Bradford Breaker Drop Tests (1696/SW/80) Apr 1980D/D PRO/NCB/6/1821

Use of the Telsec X-Ray Fluorescence Analyser for Determination of Ash in coal; a means of dealing with variable iron contents (1695/SW/80) Feb 1980D/D PRO/NCB/6/1822 a-b

Use of the Telsec Lab-X Analyser for the Routine Laboratory Determination of Ash Content of Coal. Part 1, Sources of Error and Calibration Techniques (1695B) May 1981D/D PRO/NCB/6/1823

G.C.G. Washery. Float and Sink Analysis of Raw culm to Plant (1694/SW/80) Mar 1980D/D PRO/NCB/6/1824

L.R.I.C. Report on the Determination on Carbon in Various Compounds by Potentiometry (1692) {1980}D/D PRO/NCB/6/1825 a-c

Onllwyn Washery. Washing Test on Treforgan R.O.M (1693/SW/80) Feb 1980D/D PRO/NCB/6/1826

Photographs taken in Swansea docks depicting the ventilation of coal vessels (1691/SW/80) 1980D/D PRO/NCB/6/1827

Wagon Top Sampling of Anthracite Washed Duff at Swansea Docks for Moisture and Ash. Part II (1690/SW/79) Aug 1980D/D PRO/NCB/6/1828

Wagon Top Sampling of Anthracite Washed Duff at Swansea Docks for Moisture and Ash. Part I (1690/SW/79) Jan 1980D/D PRO/NCB/6/1829

Explosion at Sea - 17 November, 1979. M.V. Craigmore (on passage from Swansea to Warrenpoint, Northern Ireland) (1688/SW/79) Dec 1979D/D PRO/NCB/6/1830

Copies of three pages of the report on the hold explosion on board the M.V. Craigmore. Dec 1979D/D PRO/NCB/6/1831

Seam Analysis Report. Cwmgwili Colliery, Rock Vein (1686/SW/79) Oct 1979D/D PRO/NCB/6/1832

Ryan's Industrial Fuels at Cwmbargoed. Test Wash of Cwmgwili Raw Smalls (1684/SW/79) Aug 1979D/D PRO/NCB/6/1833

The rapid determination of the sulphur content of coal using the Phase 3A Ash Monitor and the Rapid Ash Analyser (1681/79/SW) May 1979D/D PRO/NCB/6/1834

Tarry Matter - in Anthracite and Dry Steam Coals (1685/SW/79) Sep 1979D/D PRO/NCB/6/1835

The Determination of the Sulphur Content of Coal by an Energy Dispersive X-Ray Fluorescence Analysis Technique. Jun 1978D/D PRO/NCB/6/1836

Investigation of proposed changes in the sizes of Anthracite Graded Products (A492/86/DF) Sep 1986D/D PRO/NCB/6/1837

An in-depth analysis of coals currently being worked at Blaenserchan Marine and Six Bells Collieries. Jun 1985D/D PRO/NCB/6/1838

Cwmneol Tip (No. 661) - float and sink analysis (1773/86/SW) Aug 1986D/D PRO/NCB/6/1839

Blaenant Colliery. Quality of ROM Material and Blended Smalls. Report No. 5 (May and June 1986) (1772/SW/86) Aug 1986D/D PRO/NCB/6/1840

Table of commercially disposable and saleable products for the three months ending March 1986 (1771/SW/86) 1986D/D PRO/NCB/6/1841 a-c

Pantyffynon Tip. Float and Sink Analysis (1770/SW/86) May 1986D/D PRO/NCB/6/1842

Blaenant Colliery. Quality of ROM Material and Blended Smalls. Report No. 3 (March 1986). Apr 1986D/D PRO/NCB/6/1843

Blaenant Colliery. Quality of ROM Material and Blended Smalls. Report No. 4 (April 1986) 1986D/D PRO/NCB/6/1844

Blaenant Colliery. Quality of ROM Material and Blended Smalls. Report No. 2 (February 1986) Mar 1986D/D PRO/NCB/6/1845

Blaenant Colliery. The Feasibility of Monitoring the Quality of Face Run-of-Mine Material by Direct Computation (1768/SW/86) Feb 1986D/D PRO/NCB/6/1846

Blaenant Colliery. Face R.O.M.s. Float and sink analysis (1767/SW/85) Feb 1986D/D PRO/NCB/6/1847

Blaenant Colliery. Face R.O.M.s. Float and sink analysis (1766/SW/86) Jan 1986D/D PRO/NCB/6/1848

Blaenant Colliery. Float and Sink Test of the R.O.M (1765/SW/85) Nov 1985D/D PRO/NCB/6/1849

Memorandum detailing the results of the Blaenant Washery test taken on 2 July 1985. Jul 1985D/D PRO/NCB/6/1850

Cynheidre Colliery. Float and Sink Analysis of the Felen Seam R.O.M (1762/SW/85) Oct 1985D/D PRO/NCB/6/1851

Aberpergwm Colliery. Feed to Washery. Float and Sink Analysis (1761/SW/85) Sep 1985D/D PRO/NCB/6/1852

Memorandum summarising the results of test on Treforgan Run of Mine stock (1760/SW/85) Sep 1985D/D PRO/NCB/6/1853

Cefn Coed North and South Tips. Float and Sink Analysis (1759/SW/85) Jul 1985D/D PRO/NCB/6/1854

Aberpergwm/Blaengwrach Tip No. 204. Float and Sink Analysis (1758/SW/85) May 1985D/D PRO/NCB/6/1855

Preliminary Report, Aberpergwm Colliery Nine Feet Seam. N2 Face, N3 Face Driveage, N4 Face Driveage (1757/SW/85) Apr 1985D/D PRO/NCB/6/1856

Cross Hands Tip (Tip No. 25). Test wash at Blaenhirwaun Washery (1756/SW/85) Apr 1985D/D PRO/NCB/6/1857 a-b

Aberpergwm Colliery. Float and Sink Analysis of the Raw Feed (1755/SW/85) Apr 1985D/D PRO/NCB/6/1858

Surface Bore Hole Report. Abernant No. 9: Nant-y-Gwn, the Lower Four Feet Seam at 834.28m (1754/SW/85) Feb 1985}D/D PRO/NCB/6/1859

Letter and report produced by South Yorkshire Laboratory relating to commissioning trials of a Gamma Ray Density Probe (1751/SW/84) Aug 1969D/D PRO/NCB/6/1860

Surface Borehole Report: Glyncastle No.1 (Carn Caglau), sunk October 1983 (1750/84/SW) 1984D/D PRO/NCB/6/1861

Seam Analysis Report. Cynheidre Colliery Lower Gellideg (Pumpquart) (1747/SW/84) Jun 1983D/D PRO/NCB/6/1862

Seam Analysis Report. Cynheidre Colliery, Upper Two Feet Nine Seam (Felen) (1746/SW/84) Mar 1984D/D PRO/NCB/6/1863

Surface Borehole Report. Cynheidre, Gelli Fawr. 2/8 (1745/SW/84) jun 1864D/D PRO/NCB/6/1864

Surface Borehole Report. Cynheidre (Trefanau Uchaf?) 2/6 (1744/SW/84) May 1984D/D PRO/NCB/6/1865

Surface Borehole Report. Cynheidre 2/7 (1743/SW/84) May 1984D/D PRO/NCB/6/1866 a-b

Surface Borehole Report. Cynheidre 3/4 (1742/SW/84) May 1984D/D PRO/NCB/6/1867 a-c

Proposed Reclamation Scheme, Khartoum Terrace and Aerial Ropeway Tips, Onllwyn (1741/SW/84) Jun 1983D/D PRO/NCB/6/1868

Table of Commercially Disposable and Saleable Products for the Six Months ending December 1983 (1740/84/SW) 1984D/D PRO/NCB/6/1869

An Investigation into the Determination of a Pyritic Sulphur in Coal by an X-Ray Fluorescence Technique (1739/84/SW B) Feb 1984D/D PRO/NCB/6/1870 a-b

Determination of Mean Flow Moisture Point using vibrating table technique (1659/78/SW) Feb 1978D/D PRO/NCB/6/1871

Instructions to the Officer in Charge of Swansea Docks about the procedures relating to coal shipments. n.d.D/D PRO/NCB/6/1872

Flow Moisture - Vibrating Platform Method. Mar 19867D/D PRO/NCB/6/1873

Appraisal of Vibrating Platform. Nov 1981D/D PRO/NCB/6/1874

Examination of flow moisture tests and factors used to calculate transportable moisture during period 1978-82 (1738/94/SW) 1984D/D PRO/NCB/6/1875

Aberpergwm Washery. Washing test of Tower Stock R.O.M (1737/84/OC) 1984D/D PRO/NCB/6/1876

Wernos Washery. Feed to Washery -Betws C.R.O.M. Float and Sink Analysis (1736/84/SW) Jan 1984D/D PRO/NCB/6/1877

Tower Washery - Float and Sink Analysis of Trecatty Smalls (10mm x 0) (1735/83/SW) Jul 1983D/D PRO/NCB/6/1878

Washability Test on Mardy Coal at Abernant Coal Preparation Plant on Tuesday July 5th 1983 (1734/83/SW) Aug 1983D/D PRO/NCB/6/1879a-b

Table of Commercially Disposable and Saleable Products for the Six Months ending December 1982 (1732/SW/83) 1983D/D PRO/NCB/6/1880

Appliance Tests on Samples of Firegold Briquettes from Petrofina Ref. DF88/2 & DF88/4 (SWA.D/Fl.6) Mar 1988D/D PRO/NCB/6/1881a-b

Tower/Mardy Colliery. R.O.M. Feed to Washery. Float and Sink Analysis (1799/SW/87) Aug 1987D/D PRO/NCB/6/1882

Performance of Tower Beans and Grains in a domestic gravity feed boiler (1801/SW/87) Aug 1987D/D PRO/NCB/6/1882a

Abernant Colliery. Feed to Washery (17.11.87) (SWL/GC4815/03A/10) Dec 1987D/D PRO/NCB/6/1883

Seam Analysis Report, Marine Colliery, Yard and Seven Feet Seams (SWL/GC4988/34C/23) Mar 1988D/D PRO/NCB/6/1884

The Peformance of Coedbach Grains in a Domestic Gravity Feed Boiler (SWL/DF/87/227) Jan 1988D/D PRO/NCB/6/1885

The Performance of Abernant Grains in a Domestic Gravity Feed Boiler (SWL/DF/87/226) Jan 1988D/D PRO/NCB/6/1886

The Performance of Cynheidre Grains in a Domestic Gravity Feed Boiler (SWA/DF/87/225) Jan 1988D/D PRO/NCB/6/1887

Seam Analysis Report, Six Bells Colliery, Amman and Yard Seams (Meadow) (SWL/GC4959/45C/22) Feb 1988D/D PRO/NCB/6/1888

British Coal Corporation. Opencast Borehole Report, Park Slip West, Western Area (SWL/GC4964/65m/10) Feb 1988D/D PRO/NCB/6/1889a-b

Seam Analysis Report, Six Bells Colliery, Amman and Yard Seams (Meadow) (SWL/GC4949/45C/21) Feb 1988D/D PRO/NCB/6/1890

Blaenant R.O.M. Float and Sink Analysis (1795/SW/87) Jun 1987D/D PRO/NCB/6/1891

British Coal Corporation. Opencast Borehole Report, New Bryndias, Western Area (SWL/GC4912/65m/10) Feb 1988D/D PRO/NCB/6/1892

Seam Analysis Report, Cynheidre Colliery, Upper Four Feet and Six Feet (Big Vein) (SWL/GC4926/24C/10) Jan 1988D/D PRO/NCB/6/1893

British Coal Corporation. Opencast Borehole Report, Glanstony Extension West, Western Area (SWL/GC4910/65m/10) Jan 1988D/D PRO/NCB/6/1894

British Coal Corporation. Opencast Borehole Report, Cilrhedyn, Western Area (SWL/GC4911/65m/10) Jan 1988D/D PRO/NCB/6/1895

Marine. R.O.M. Feed to Washery, Float and Sink Analysis (SWL/GC4808/34A/10) Dec 1987D/D PRO/NCB/6/1896

Seam Analysis Report, Abernant Colliery, Lower Six Feet Seam (SWL/GC/4811/65C/15) Nov 1987D/D PRO/NCB/6/1897

Surface Borehole, Abernant No.8, Gordre'r Garth (SWL/GC4776/65C/SB8) Nov 1987D/D PRO/NCB/6/1898

Surface Borehole, Abernant No.9, Nant-y-Gwyn (SWL/GC4779/65C/SB9) Nov 1987D/D PRO/NCB/6/1899

Seam Analysis Report. Mardy Colliery, Seven Feet Seam (SWL/GC4746/33C/19) Nov 1987D/D PRO/NCB/6/1900

Seam Analysis Report, Six Bells Colliery, Amman and Yard Seam (Meadow) (SWL/GC4751/45C/20) Nov 1987D/D PRO/NCB/6/1901

Memorandum and report dealing with sources of dirt in the R.O.M Product from Blaenant Colliery. Sep 1987D/D PRO/NCB/6/1902

Seam Analysis Report, Blaenant, No.2 Rhondda (1807/87/SW) Sep 1987D/D PRO/NCB/6/1903

Seam Analysis Report, Abernant, Red Vein (1804/SW/87) Oct 1987D/D PRO/NCB/6/1904

Memorandum and report on ash and dirt in ROM. Oct 1987D/D PRO/NCB/6/1905

Cynheidre Colliery. Feed to Washery (1804/SW/87) Oct 1987D/D PRO/NCB/6/1906

Marine Feed to Washery. Float and Sink Analysis (1802/SW/87) Sep 1987D/D PRO/NCB/6/1907

Penallta Colliery. Test Wash of Penallta R.O.M. Feed to Washery (1805/SW/87) Oct 1987D/D PRO/NCB/6/1908

Trelewis R.O.M. at Nelson Bog. Float and Sink Analysis (1800/SW/87) Aug 1987D/D PRO/NCB/6/1909

Underground Borehole Report. Deep Navigation. Underground Borehole No. 27 in B 108 Tail Road (1798/SW/87) Jul 1987D/D PRO/NCB/6/1910

Seam Analysis Report, Taff Merthyr Colliery, Seven Feet Seam (1797/SW/87) Jun 1987D/D PRO/NCB/6/1911

Preliminary Report, Blaenant Coliery, No.2 Rhondda Seam, tested April; 1987 (1796/SW/987) Jun 1987D/D PRO/NCB/6/1912

Tower Colliery, ROM to Stck. Float and Sink Analysis (1794/SW/87) Jun 1987D/D PRO/NCB/6/1913

Memorandum and report on a degradation survey made at Tower/Mardy Colliery (1793/SW/87) Jun 1987D/D PRO/NCB/6/1914

Memorandum and Report relating to sources of dirt in ROM product at Taff Merthyr Colliery (1792/SW/87) Jun 1987D/D PRO/NCB/6/1915

Penallta M24 District R.O.M (1791/SW/87) May 1987D/D PRO/NCB/6/1916

Penallta M18 District R.O.M (1790/SW/87) Jun 1987D/D PRO/NCB/6/1917

Memorandum on the progress in Nuecleic On-line Monitoring techniques and ROM monitoring (1789/87/SW) Jun 1987D/D PRO/NCB/6/1918

Memorandum and report on sources of dirt in R.O.M. product at Marine Colliery (1788/87/SW) Jun 1987D/D PRO/NCB/6/1919

Memorandum and Report on the degradation survey taken at Marine Colliery (1787/87/SW) Jun 1987D/D PRO/NCB/6/1920

Report and Statistics from a sample taken of Betws ROM S3 district, taken on 28 Feb 1987. Jul 1987D/D PRO/NCB/6/1921

Seam Analysis Report, Oakdale Colliery, Upper Nine Feet Seam (1785/87/SW) Jul 1987D/D PRO/NCB/6/1922

Memorandum and Report on the degradation survey taken at Siix Bells Colliery (1784/87/SW) Jun 1987D/D PRO/NCB/6/1923

Memorandum and Report on the sources of dirt in ROM product at Six Bells Colliery (1783/87/SW) Jun 1987D/D PRO/NCB/6/1924

Six Bells. M3 District ROM Float and Sink Analysis (1782/87/SW) Jun 1987D/D PRO/NCB/6/1925

Wern Tarw Tip. Preliminary Survey, Float and Sink Analysis (1787/87/SW) Jul 1987D/D PRO/NCB/6/1926

The Performance of a Sample of Blaenant Nuts Ex. Aberpergwm Washery in a Roomheater (1780/87/SW) Mar 1987D/D PRO/NCB/6/1927

Evaluation of Bretby Pelletised Anthracite Duff (1779/87/SW) Dec 1986D/D PRO/NCB/6/1928

Coal Sizer Tests at Wernos Washery (1777/87/SW) Oct 1986D/D PRO/NCB/6/1929

Ffos Las Opencast Stock Wash at Cynheidre (1778/86/SW) Dec 1986D/D PRO/NCB/6/1930

Abernant Washery. Washability Test on Ffos Las Opencast Stock (1776/86/SW) Nov 1986D/D PRO/NCB/6/1931

Memorandum: Abernant Washery. Crushing of Cobbles. Jan 1986D/D PRO/NCB/6/1932

Price List from 1 April 1985. Apr 1985D/D PRO/NCB/6/1933

Cynheidre Colliery. An Assessment of the Effects of the MMD Sizer on the Size Distribution of the Run-of-Mine Material (1775/SW/86) Sep 1986D/D PRO/NCB/6/1934

A Survey of the Organisation and Functions of the Coal Branch Mar 1986D/D PRO/NCB/6/1935

The Performance of Onllwyn Beans in a Domestic Gravity Feed Boiler (SWL/DF/87/228) Jan 1988D/D PRO/NCB/6/1936

The Perfomance of Coedbach Grains in a Domestic Gravity Feed Boiler (DF/87/227) Jan 1988D/D PRO/NCB/6/1937

The Performance of Abernant Grains in a Domestic Gravity Feed Boiler (DF/87/226) Jan 1988D/D PRO/NCB/6/1938

The Performance of Cynheidre Grains in a Domestci Gravity Feed Boiler (DF/87/225) Jan 1988D/D PRO/NCB/6/1939

Graph showing the carbon-volatile relation. Sep 1984D/D PRO/NCB/6/1940a-b

Letter and graphs relating to coal grains sampling. Dec 1986D/D PRO/NCB/6/1941

The Performance of Abernant Grains in a Domestic Gravity Feed Boiler (DF/87/227) Jan 1988D/D PRO/NCB/6/1942

The Performance of Coedbach Grains in a Domestic Gravity Feed Boiler (DF/87/) Jan 1988D/D PRO/NCB/6/1943

The Performance of Onllwyn Beans in a Domestic Gravity Feed Boiler. Jan 1988D/D PRO/NCB/6/1944

The Perfomance of Cynheidre Grains in a Domestic Gravity Feed Boiler. Jan 1988D/D PRO/NCB/6/1945

Appliance Performance Tests on Samples of Test Briquettes. Oct 1987D/D PRO/NCB/6/1946

Appliance Performance Tests on Samples of Test Briquettes. Sep 1987D/D PRO/NCB/6/1947

Letter and Report relating to an analysis test made on a sample of 'Stovesse' Marked 'B', submitted by Minton, Treharne and Davies. Jul 1987D/D PRO/NCB/6/1948a-c

Letter and Report relating to an analysis test made on a sample of Stovesse submitted by Minton, Treharne and Davies. Jul 1987D/D PRO/NCB/6/1949a-b

The Performance of a Sample of Lady Windsor Cobbles on the Stool Bottom Grate and in a Glass Fronted Boiler. Mar 1987D/D PRO/NCB/6/1950a-b

Letter and Report relating to an analysis test made on a sample of grains, submitted by Minton, Treharne and Davies. Mar 1987D/D PRO/NCB/6/1951

The Performance of a Sample of Blaenant Nuts Ex Aberpergwm Washery in a Roomheater (DF 87/215) Mar 1987D/D PRO/NCB/6/1952

Further Appliance Tests on a Specially Prepared Blend of Bean Sized Phurnacite and Anthracite Beans (DF/86/213) Dec 1986D/D PRO/NCB/6/1953a-b

An Appliance Test on a Sample of Grains Sampled at Western Fuel Co., Wapping Wharf, Bristol (DF/87/218) Mar 1987D/D PRO/NCB/6/1954

Appliance Test Report. Sample of Stovesse from Wapping Wharf, Bristol Docks (DF/86/212) Nov 1986D/D PRO/NCB/6/1955

The Performance of a Sample of Lady Windsor Cobbles on the Stool Bottom Grate (DF/86/211) Nov 1986D/D PRO/NCB/6/1956a-b

Appliance Tests on a Specially Prepared Blend of Bean Sized Phurnacite and Anthracite Beans (DF/86/210) Oct 1986D/D PRO/NCB/6/1957

The Performance of a sample of Holditch trebles on the Stool Bottom Grate (DF/86/209) Aug 1986D/D PRO/NCB/6/1958

The Performance of a Sample of Oakdale Cobbles on the Stool Bottom Grate (DF/86/208) Jul 1986D/D PRO/NCB/6/1959

Appliance Performance tests on MRDE Pelletised Anthracite Duff (Bretby Baps) (DF/86/207) Jul 1986D/D PRO/NCB/6/1960

The Performance of a Sample of Caeharris Opencast Coal on the Stool Bottom Grate (DDF/86/206) Jun 1986D/D PRO/NCB/6/1961

The Performance of a Sample of Cwm Housecoal Cobbles on the Stool Bottom Grate (DF/86/205) May 1986D/D PRO/NCB/6/1962

Letter and report The Performance of a Sample of Marine Housecoal Cobbles on the Stool Bottom Grate (DF/86/203) Mar 1986D/D PRO/NCB/6/1963

The Performance of a Selection of South Wales Housecoal Products on the Stool Bottom Grate (DF/86/202) Jan 1986D/D PRO/NCB/6/1964

The Performance of a Selection of South Wales Housecoal Products on the Stool Bottom Grate. Includes handwritten (draft?) of contents and tables of radiation statistics (DF/86/202) Jan 1986D/D PRO/NCB/6/1965

Performance of Bobrite Anthracite Briquettes. Jan 1986D/D PRO/NCB/6/1966

Housecoal Radiation Test Results on Housecoal from Maescymmer Coal Co (DF/86/200) Jan 1986D/D PRO/NCB/6/1967

Report on the suitability of Tower grains in domestic G.f. boilers. File includes radiation reports on Penallta Cobbles marked DF/85/198 (DF/85/199) Dec 1985D/D PRO/NCB/6/1968

Radiation Test reports on Lady Windsor coal sized 3 R x 1.5R (DF/85/197) Nov 1985D/D PRO/NCB/6/1969

Housecoal Radiation Test report on Penallta Screened 3R x 2R (DF/85/196) Oct 1985D/D PRO/NCB/6/1970

Radiation test report on Kellingley Cobbles and covering letter (DF/85/195) Jun 1985D/D PRO/NCB/6/1971

The Determination of the radiation characteristics of a domestic open fire housecoal sample supplied by Minton, Treharne and Davies, Cardiff (DF/85/194) May 1985D/D PRO/NCB/6/1972

Sample of South African Anthracite Stovenuts (DF/85/193) May 1985D/D PRO/NCB/6/1973

Sample of Fuel from Pascoe Fuels Limited (DF/85/192) Apr 1985D/D PRO/NCB/6/1974

Houscoal Radiation Test reports on Lady Windsor Nuts (Approx 2"x1"), as rec'd (DF/85/191) Apr 1985D/D PRO/NCB/6/1975

Pennsylvania Anthracite (DF/85/190) Mar 1985D/D PRO/NCB/6/1976

Housecoal Radiation Test report on Llanharan Opencast Coal (DF/84/189) Oct 1984D/D PRO/NCB/6/1977

Anthracite from Saline Coal Company, (Scotland) (DF/84/188) Aug 1984D/D PRO/NCB/6/1978

Report on the proposed extension to the East Pit Opencast site, containing an analysis of products (DF/84/187) Jul 1984)D/D PRO/NCB/6/1979

Anthracite from Gulf Canada (DF/84/186) Apr 1984D/D PRO/NCB/6/1980

Anthracite Beans Consignment returned from Howdens, Larne, (N. Ireland) (DF/84/185) Feb 1984D/D PRO/NCB/6/1981

Anthracite Beans Consignment returned from Bangor, (N. Ireland) (DF 84/184) Jan 1984D/D PRO/NCB/6/1981a

Anthracite from East Pennsylvania (DF/83/183) Dec 1983D/D PRO/NCB/6/1982

Housecoal Radiation Test report on Marine Housecoal (DF/83/182) Dec 1983D/D PRO/NCB/6/1983

Housecoal Radiation Test report on Graigwen Colliery (Licensed Mine) (DF/83/181) Nov 1983D/D PRO/NCB/6/1984

Performance of Cynheidre Beans in a Domestic Gravity Feed Boiler (DF/83/180) Nov 1983D/D PRO/NCB/6/1985

Performance of Cynheidre Grains in a Domestic Gravity Feed Boiler (DF/83/179) Nov 1983D/D PRO/NCB/6/1986

Housecoal Radiation Test report on Nantgarw Cobbles (DF/83/178) Apr 1983D/D PRO/NCB/6/1987

Housecoal Classification Testing on a sample of Parkslip Washed Nuts 3x1 handpicked from stockpile of Nominal 2x0 (DF/83/177) Jun 1983D/D PRO/NCB/6/1988

The Suitability of G.C.G. grains for domestic g.f. boilers (DF/83/176) May 1983D/D PRO/NCB/6/1989

Increasing the availability of Beans by raising top size to 22.4 mm (DF/83/175) May 1983D/D PRO/NCB/6/1990

Radiation Tests on Nantgarw Cobbles (DF/83/174) Apr 1983D/D PRO/NCB/6/1991 a-b

Housecoal Radiation Test report on Britannia Cobbles Washed at Maesteg Washery (DF/83/173) Mar 1983D/D PRO/NCB/6/1992

Report on the explosion at Glyncorrwg Colliery, Glamorganshire on 13 January 1954. 1955D/D PRO/NCB/6/1993

Photocopies of tables of coal exports 1579 - 1713 n.d.D/D PRO/NCB/6/1994

An Appraisal of the Quantity and Quality of Carbonisation Coal Reserves in East and West Wales (1075) Aug 1971D/D PRO/NCB/6/1995

How some Firedamp explosions are prevented. Part 3 of a series entitled "What Every Mining Man Should Know". 1930D/D PRO/NCB/6/1996

C.R.E. Technology Review No.2. Chlorine in Coal. Dec 1982D/D PRO/NCB/6/1997

Margam Project, Gellideg Seam, Boreholes 6, 8, 9, 10, 11, 12 and 13. 1980sD/D PRO/NCB/6/1998

Cynheidre 2/5 Surface Borehole sunk March-Nov 1982 Mar 1984D/D PRO/NCB/6/1999

Differential Scanning Calorimity. c. 1975D/D PRO/NCB/6/2000

Betws Colliery. Comparison of ROM Stock and Current Make at Wernos Washery (1708/SW/80) Sep 1980D/D PRO/NCB/6/2001

A Page of information about various coal products, also showing aims and objectives. n.dD/D PRO/NCB/6/2002

Various borehole reports for Cynheidre May-Jun 1984D/D PRO/NCB/6/2003

Experience of Stocking Coal in the East Midlands Division (10/66) Mar 1966D/D PRO/NCB/6/2004

Article from Chemistry in Britain May 1984 entitled "Acid Rain - the CEGB view" May 1984D/D PRO/NCB/6/2005

Article from Energy World entitled Problems and Policies Associated with Acid Rain. Aug/Sep 1984D/D PRO/NCB/6/2006

Photocopied Article from Technical Papers entitled Hot Coal - Bulk Transport and Storeage Feb 1985D/D PRO/NCB/6/2007

Article entitled Coal Mining in South Wales, including a map showing individual named mines. c.1985D/D PRO/NCB/6/2008

Fuel. A Journal of Fuel Science 1966D/D PRO/NCB/6/2009

Surface Borehole Cwm No. 4 Rhiwfelin, Drilled Jan-Mar 1985. c.1985D/D PRO/NCB/6/2010

A Literature Survey of the treatment of Mine Waters. Apr 1953D/D PRO/NCB/6/2011

Survey of Mine Waters. Oct 1952D/D PRO/NCB/6/2012

Seam Analysis Report, Cynheidre Colliery, Four Feet and Upper Six Feet Seams (Big Vein) Jun 1983D/D PRO/NCB/6/2013

Seam Analysis Report, Mardy Colliery, Seven Feet Seam. Dec 1981D/D PRO/NCB/6/2014

Seam Analysis Report, Tower Colliery, Seven Ft and part of Five Ft Seam. May 1985D/D PRO/NCB/6/2015

Seam Analysis Report, Cynheidre Colliery, Lower Gellideg Seam (Pumpquart) Jun 1983D/D PRO/NCB/6/2016

Atmospheric Pollution by Coal Products Plants, a report for the NCB coal products division by J.L.M. Launder and J.D. Watt. Apr 1972D/D PRO/NCB/6/2017

Folder labelled A literature survey of the treatment of mine waters containing tables of results for Ammanford Colliery. Oct 1953D/D PRO/NCB/6/2018

Memorandum and article entitled Technical Conference - Carbonisation, C.R.E. Stoke Orchard, 9th/10th May. Apr 1972D/D PRO/NCB/6/2019

NCB Staff Superannuation Scheme, explanatory booklet 1978D/D PRO/NCB/6/2020

Noxious Gases Underground, A Handbook for Colliery Managers. Jun 1971D/D PRO/NCB/6/2021

NCB Staff Superannuation Scheme: Resolution, Scheme and Rules. 1964D/D PRO/NCB/6/2022

A Laboratory Investigation of the Physical and Chemical Properties of Burnt Colliery Shale. 1967D/D PRO/NCB/6/2023

Road Research Laboratory, Ministry of Transport booklet The effects of sulphates in colliery shale on its use for roadmaking. 1970D/D PRO/NCB/6/2024

Specification and other information about the Detector E.H.T. n.d.D/D PRO/NCB/6/2025

Carbonisation Research report Moisture determination by microwave heating. Dec 1981D/D PRO/NCB/6/2026

Carbonisation research at CRE: Preparation and Assessment of Coals and Cokes. May 1972D/D PRO/NCB/6/2027

Carbonisation Section Report. Progress report on Carbonisation Research at CRE - No.7 Jan 1972D/D PRO/NCB/6/2028

The Institution of Mining Engineers The Rapid Determination of the Explosibility of Mine Fire Gases. Oct 1960D/D PRO/NCB/6/2029

Cation Analysis with Thin Layer Chromatography, by K. Jones. Jun 1968D/D PRO/NCB/6/2030

The Determination of Sulphur in Coal using the N900 Non-dispersive X-Ray analyser. Nov 1972D/D PRO/NCB/6/2031

The Analysis of Clay Samples supplied by British Industrial Sands with the N900. Feb 1971D/D PRO/NCB/6/2032

Chief Scientists Conference - May 1972. Technical Section - Carbonisation. Paper 3 - Coal Petrography as a guide to Carbonisation. May 1972D/D PRO/NCB/6/2033

South Wales Area Maritime Laboratory. Report on Abernant Colliery: Washing Test of Red Vein R.O.M. at Wernos Washery (SWL/GC 305/03A/10) n.d.D/D PRO/NCB/6/2034

The Mineralogy of the South Wales Coalfield by J. N. M. Firth Jul 1971D/D PRO/NCB/6/2035

Index of colliery reports with their reference codes. n.d.D/D PRO/NCB/6/2036

Coal Analyses for various collieries. 1979/1980D/D PRO/NCB/6/2037

South Wales Area Laboratory. Surface Borehole Betws 12 (Hafod). Drilled Mar-May 1985 (SWL/GC 4429/87C/SB12) Nov 1987D/D PRO/NCB/6/2038

South Wales Area Laboratory. Surface Borehole Betws No. 14. Llettyr Crydd. Drilled May-Jul 1986 (SWL/GC 4874/87C/SB14) Jan 1988D/D PRO/NCB/6/2039

Seam Analysis Report, Abernant Colliery, Red Vein (SWL/GC3467/65C/11 (W) ) Aug 1983D/D PRO/NCB/6/2040

Seam Analysis Report, Betws Colliery, Red Vein (SWL/GC3452/87C/06 (W) ) Jun 1983D/D PRO/NCB/6/2041

The Margam Project: The Upper Nine Feet Seam, Boreholes 5, 6, 8, 9, 10, 11, 12, 13 (SWL/GC3645/54C/4SB) Sep 1984D/D PRO/NCB/6/2042

Index to Special Reports. n.d.D/D PRO/NCB/6/2043

NCB Coal Preparation Certificate Course. 1981D/D PRO/NCB/6/2044