| RefNo | AP/13/13/2 |
| Level | Item |
| Title | Unpublished manuscript, 'On the importance of an expedition to determine the exact position if the NW [northwest] magnetic pole' by Colonel [John] Macdonald |
| Date | 10 March 1828 |
| Description | Macdonald writes about the importance of discovering the present position of the northwest pole or moving magnetic power and writes about planning considerations for the expedition party. He insists that a theory of magnetic variation cannot be established until the precise location, rate of movement, and nature of the revolving path of the two magnetic poles is determined. Includes two illustrations in the text.
Subject: Geodesy
Written by Macdonald in Summerlands, Exeter [Devon, England]. Communicated by Sir Humphry Davy. |
| Extent | 16p |
| Format | Manuscript |
| PhysicalDescription | Ink on paper |
| AccessStatus | Open |
| RelatedRecord | AP/13/13 |
Fellows associated with this archive
| Code | PersonName | Dates |
| NA8200 | Davy; Sir; Humphry (1778 - 1829); chemist | 1778 - 1829 |
| NA3036 | Macdonald; John (1759 - 1831) | 1759 - 1831 |