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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/11/68" 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 Francis Charles Knowles to Sir John Herschel, dated at Belvedere House, Ryde</dc:title>
  <dc:description>Autograph letter signed by sender. Would like John Frederick William Herschel's comments on one of his own theories regarding screw propulsion of ships. Sent it to the Admiralty, who rejected it. Can John Frederick William Herschel's son recommend a good resume of the physical and chemical composition of aerolithes?</dc:description>
  <dc:date>17 April 1866</dc:date>
</rdf:Description>