| RefNo | AP/56/5/4 |
| Level | Item |
| Title | Unpublished diagram, 'Diagram showing how, when the eyeball simply rotates, the successive positions of the visual line converge to a common centre' by John Lucas Tupper |
| Creator | Tupper; John Lucas (c 1824-1879); British artist; Teacher of Geometrical Projection at Rugby School |
| Date | 1874 |
| Description | A diagram in black ink showing a rectangular surface with 'a perforated septum' at one edge. Lines radiate from the septum, with two arcs marked on the rectangular surface with pins. A note states 'The pins are much nearer to the eye than in the experiment.'
Subject: Optics |
| Extent | 1p |
| Format | Diagram |
| PhysicalDescription | Ink on paper |
| AccessStatus | Open |