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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/EL/G1/32" 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 des Gabetz to du May</dc:title>
  <dc:description>Discussing the Copernican system; discussing perpetual motion; concerning Huygens's pendulum clock; discussing ways to navigate at sea with a new instrument.
Figures in text.
Read on 2 December 1669</dc:description>
  <dc:date>1669</dc:date>
</rdf:Description>