Reference numberAP/14/13
TitleUnpublished paper, on magnetic variation by John Macdonald
Date29 May 1830
DescriptionMacdonald analyses observations of diurnal magnetic variation taken in Calcutta [Kolkata, West Bengal, India] from February 1827 to February 1828 and includes this set of observations within his text. This text forms part of Macdonald's quest to find an 'unexceptionable' theory of magnetic variation. Includes one figure in the text.

Subject: Geodesy

Written by Macdonald in Summerlands, Exeter [Devon, England]. Received by the Royal Society on 3 June 1830.
Physical descriptionInk on paper
Access statusOpen
Related records in the catalogueAP/14/13/1
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