| RefNo | AP/24/6/4 |
| Level | Item |
| Title | Unpublished figure, rudder by Robert Deverell |
| Creator | Deverell; Robert (fl 1839) |
| Date | 4 December 1839 |
| Description | Simple figure of rudder, as part of Deverell's ship analogy to explain the phenomena of the Earth's magnetic field. |
| Extent | 1p |
| Format | Drawing |
| PhysicalDescription | Ink on paper |
| AccessStatus | Open |