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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/EL/H1/72" 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 Christian Huygens to Henry Oldenburg, dated at Paris</dc:title>
  <dc:description>Discussing Newton's article in 'Philosophical Transactions' about lenses and mirrors for telescopes; discusses Slusius's analysis of Alhazen's problem about reflected rays (figures in text)
Oldenburg's notes on reverse</dc:description>
  <dc:date>9 April 1672</dc:date>
</rdf:Description>