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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/MS/257/1/44" 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 Biddell Airy, Royal Observatory Greenwhich to Edward Sabine</dc:title>
  <dc:description>Airy is sending Sabine part of a letter he has received from Professor [George Adolf] Erman [not enclosed]. In his letter Erman remarks on the regions of the earth in which [H J R] Petersen’s constants represent the observed facts of terrestrial magnetism better than [Karl Friedrich] Gauss’s, and vice versa, and suggestions to improve both systems. Airy suggests securing the services of someone who can investigate this matter further.</dc:description>
  <dc:date>7 April 1870</dc:date>
</rdf:Description>