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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/LBO/5/95" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Copy  extract of a letter from Christian Huygens, Paris, to Henry Oldenburg</dc:title>
  <dc:description> 'Concerning his thoughts upon Monsieur Slusius his last construction of the problems of Alhazeni, together with his owne Calculus of ther same ; as also about Mr Newtons reflecting Telescope, and new Theory of light and Colours. '</dc:description>
  <dc:date>1 July 1672</dc:date>
</rdf:Description>