Reference numberAP/12/15/1
TitleUnpublished letter, regarding the magnetic pole from John Macdonald to Sir Humphry Davy
Date28 September 1825
DescriptionMacdonald asks that Davy acknowledge receipt of his letter and provide comments as he sees fit. He reports that he will be writing a paper on the variation of the compass for the Encyclopaedia Metropolitana. He writes briefly about contemporary voyages in the Americas and the Bering Strait in particular, and asks that the Royal Society recommend that efforts be made to determine the precise locations of the northwest and southeast magnetic poles. He then reports on magnetic experiments of his own and praises Davy's discovery of the diminution of oxidation of copper on the bottoms of ships.

Subject: Geodesy

Written by Macdonald in Summerlands, Exeter [Devon, England].
Physical descriptionInk on paper
Access statusOpen
Related records in the catalogueAP/12/15
Fellows associated with this archive
NA8200Davy; Sir; Humphry (1778 - 1829); chemist1778 - 1829
NA3036Macdonald; John (1759 - 1831)1759 - 1831
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