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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/AP/28/8" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Unpublished paper, 'On magnetic variation' by John George Hartley</dc:title>
  <dc:description>Hartley attempts to produce an estimation of the precise value of the equinoctial or astronomical year. 

Followed by a covering letter addressed to P M [Peter Mark] Roget.

Subject: Magnetism

Received 16 October 1846.</dc:description>
  <dc:date>August 1846</dc:date>
</rdf:Description>