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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/AP/10/9" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Unpublished paper and letter, 'A simple and concise method of computing the mean distances of the planets from the sun' by Wm [William] Lydiard</dc:title>
  <dc:description>Lydiard provides a method for calculating the average distance of any planet with a known periodic revolution from the sun. Includes a diagram. Followed by a covering letter from Lydiard to the Secretary of the Royal Society.

Subject: Mathematics / Astronomy

Written by Lydiard in Plymouth [Devon, England].</dc:description>
  <dc:date>12 January 1820</dc:date>
</rdf:Description>