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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/MC/2/151" 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 John Unwin, Porter Terrace near St Mary's Church, Sheffield, to the Royal Society</dc:title>
  <dc:description>Regarding ideas and observations on a variety of topics. These include the nature of magnetic powers, the reasons for the needle pointing northward, the precision of the equinox, as well as the tides. </dc:description>
  <dc:date>15 December 1834</dc:date>
</rdf:Description>