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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/MM/3/28" 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 Thomas Williams, London, to the Royal Society</dc:title>
  <dc:description>On the length of the pendulum for a clock to keep perfect time in all latitudes and his ideas relating to the measurement of the Earth and the diameter of the Equator.</dc:description>
  <dc:date>8 February 1790</dc:date>
</rdf:Description>