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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/EL/H3/124" 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 Conrad Francis de Hatzfeld to the Royal Society, dated at London</dc:title>
  <dc:description>Wishes the Fellows to consider his wheel for perpetual motion - figure with explanation given
Read to the Royal Society on 27 May 1725
Note reads: 'Not worth entering [in the Letter Book]'</dc:description>
  <dc:date>26 May 1725</dc:date>
</rdf:Description>