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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/19/140" 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 Radcliffe Birt], dated at Collingwood</dc:title>
  <dc:description>Autograph letter signed by sender. Returns [William Radcliffe Birt's] paper on the zodiacal light. Notes error and offers John Frederick William Herschel's ideas about light's source.</dc:description>
  <dc:date>18 April 1850</dc:date>
</rdf:Description>