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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/16/382" 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 Mary Somerville</dc:title>
  <dc:description>Autograph letter signed by sender. Admires her manuscript [Mechanism of the Heavens]. Wishes [P. S.] Laplace would have lived to see it. Notes a problem with the principle of virtual velocity.</dc:description>
  <dc:date>1830-1?</dc:date>
</rdf:Description>