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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/EL/O2/50" 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 Henry Oldenburg to Renatus Slusius, dated at London</dc:title>
  <dc:description>Concerning the subject of optics; that a new theory of analysis has been extracted from letters of Fermat; concerning delivery of books from Germany and Italy to Britain; concerning Gomez Pereyra's opinion about the souls of animals and Oldenburg quotes his friend's views on it; concerning De Launay's about the Cartesian system; concerning literary notices; transcribes an extract from James Gregory's letter which was in response to Isaac Barrow about cycloform curves</dc:description>
  <dc:date>28 April 1671</dc:date>
</rdf:Description>