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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/CLP/1/16" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Letter, regarding theories about equilateral triangles by unknown author</dc:title>
  <dc:description>Letter in French with a suggestion for a solution for finding the centre of the movement of a pendulum ('le centre d'agitation d'un funipandule').

Includes one diagram in text.

Subject: Geometry / Natural Philosophy

Written at Lyon [France].</dc:description>
  <dc:date>11 March 1671</dc:date>
</rdf:Description>