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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/AP/16/25/1" 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Unpublished letter, regarding the north magnetic pole from John Macdonald to Davies Gilbert</dc:title>
  <dc:description>Macdonald shares a copy of a letter to James R Graham Bart with Gilbert. In the copy, Macdonald stresses to Bart the importance of research into the depth of the north magnetic pole. 

Subject: Magnetism / Trigonometry

Written by Macdonald at Summerlands, Exeter [England].</dc:description>
  <dc:date>19 January 1831</dc:date>
</rdf:Description>