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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/6/307" 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 Augustus De Morgan to Sir John Herschel, dated at 7 Camden St.</dc:title>
  <dc:description>Autograph letter signed by sender. Too busy to answer his last letter until now. His theorem on perspective is pretty and easy. Quotes one he uses. Has been busy finding the proof that every algebraic equation has a root. Has been organ tuning. Comments on the method of tuning using beats.</dc:description>
  <dc:date>1 January 1858</dc:date>
</rdf:Description>