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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/EL/H1/24" 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 Robert Moray, dated at Paris</dc:title>
  <dc:description>Concerns determining longitude by observing the satellites of Jupiter; concerning the descent of mercury in a tube; concerning optical glasses without tubes</dc:description>
  <dc:date>9 December 1663</dc:date>
</rdf:Description>