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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/AP/12/10/3" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Unpublished letter, regarding a perpetual motion machine from Joseph Hopkins to J F [John Frederick William] Herschel</dc:title>
  <dc:description>Hopkins asks Herschel to present his paper to the Royal Society and asks that an acknowledgement of receipt be sent to Mr Jonathan Hopkins. Herschel has written his initials next to the date received.

Subject: Physics

Written by Hopkins in Worcester [Worcestershire, England]. Received by the Royal Society on 20 November 1826.</dc:description>
  <dc:date>17 November 1826</dc:date>
</rdf:Description>