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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/26/68" 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 Sir John Herschel to Robert Hunt, dated at Collingwood</dc:title>
  <dc:description>Autograph letter signed by sender. Thanks Robert Hunt for a sample of Daguerreotype paper. Comments on some aspects of the action of 'thermic' rays and 'chemical' rays in photography.</dc:description>
  <dc:date>17 August 1840</dc:date>
</rdf:Description>