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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/LBO/5/101" 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 Isaac Newton to Mr Oldenburg</dc:title>
  <dc:description> ' Concerning the improvement of Telescopes by reflexions, and his Theory of Colours. '</dc:description>
  <dc:date>8 July 1672</dc:date>
</rdf:Description>