Comprises:
- Lect. 1: [n.d.]
- Lectures 1-4: [n.d.]
- Lect. 2: [n.d.].
- Lect. 5: Apr 7 1820, (not listed in Gee).
- Lect. 6: Apr. 10 1820 (not listed in Gee).
- Lectures 11-12: [1808?] Of the eye [n.d.] On light [n.d.]; Optics [n.d.]; Structure of the human eye [n.d.]; Diagrams of lenses [n.d.]; On colours [n.d.]; "Delaval on colours" [n.d.]; "Mr. Dalton’s ribbands by candlelight" [n.d.]; "Remarks upon the colours by candlelight and by daylight" [n.d.].