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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/AP/13/13/1" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Unpublished letter, regarding the position of the northwest magnetic pole from John Macdonald to Sir Humphry Davy</dc:title>
  <dc:description>Macdonald discusses the importance of finding the present position of the northwest pole and of planning for this expedition. He believes that the science of polar variation cannot advance without this information.

Subject: Geodesy

Written by Macdonald in Summerlands, Exeter [Devon, England].</dc:description>
  <dc:date>11 March 1828</dc:date>
</rdf:Description>