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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/EL/M1/23" 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 Robert Moray to Henry Oldenburg, dated at Oxford</dc:title>
  <dc:description>Concerning de Son's philosophy of dioptrics and parabolic lenses; concerning Mr Balle's observations of Saturn which will be sent to Huygens; concerning taxes in France

Oldenburg has added a note to de Son (in French) wishing to learn of his results and also asks about  how to extract lead from a mirror, and then the silver from the lead, at a small cost</dc:description>
  <dc:date>15 December 1665</dc:date>
</rdf:Description>