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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/17/351" 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 Sir John Herschel to William Thomson</dc:title>
  <dc:description>Autograph letter signed by sender. Comments on William Thomson's paper on geological time. Unsatisfied with the efficiency of tidal friction in retarding the rotation of the earth. Considers effect of external attraction on a rotating body to relate to momentum.</dc:description>
  <dc:date>11 August 1868</dc:date>
</rdf:Description>