<?xml version="1.0" encoding="utf-8"?>
<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/AP/16/20" 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Unpublished letter, regarding perpetual motion from Georgius Kmettyi [György Kmety] to the Royal Society</dc:title>
  <dc:description>Kmettyi shares information on the design of a perpetual motion machine which features a curved hammer and wheel.

Subject: Physics / Engineering</dc:description>
  <dc:date>1833</dc:date>
</rdf:Description>