| RefNo | AP/13/14/3 |
| Level | Item |
| Title | Unpublished diagram, ship direction and variation of compass by John Macdonald |
| Date | 12 January 1829 |
| Description | Diagram showing the impact of the direction of a ship's head with respect to the magnetic meridian on the variation of the compass.
Subject: Geodesy
Written by Macdonald in Summerlands, Exeter [Devon, England]. |
| Extent | 1p |
| Format | Diagram |
| PhysicalDescription | Ink on paper |
| AccessStatus | Open |
| RelatedRecord | AP/13/14 |
Fellows associated with this archive
| Code | PersonName | Dates |
| NA3036 | Macdonald; John (1759 - 1831) | 1759 - 1831 |