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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/MS/257/2/128" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Letter from George Adolph Erman, Berlin to Edward Sabine</dc:title>
  <dc:description>Erman refers to his reports for the British Association on his magnetical work. Discussion regarding the Gaussian constant and ‘observations in the interior of North America’. Erman informs Sabine he is now able to ‘calculate the secular changes which any magnetic phenomenon has undergone during any epoch and number of years’. Includes the true value of the coefficient.</dc:description>
  <dc:date>13 June 1871</dc:date>
</rdf:Description>