<?xml version="1.0" encoding="utf-8"?>
<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/LBO/19/75" 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 H F Hatzfield, London, to the Royal Society</dc:title>
  <dc:description> ' A Letter from Mr Hatzfield to the Royal Society, containing a further Explanation of his Instrument for the pertpetual Motion. '

Read to the Royal Society on 21 October 1725</dc:description>
  <dc:date>28 July 1725</dc:date>
</rdf:Description>