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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/LBO/21/92" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Copy letter from Mr Kingsley, York, to John Machin</dc:title>
  <dc:description>' Containing the Solution of a Problem in Diptricks relating to the concavity of Object Glasses : with Mr Eggleston's Certificate concerning the Success of the same put in practice. '

Certificate dated 15 March 1734/1735
Read to the Royal Society on 27 March 1736</dc:description>
  <dc:date>20 March 1734/1735</dc:date>
</rdf:Description>