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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/AP/56/5/3" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Unpublished diagram, geometrical diagram by John Lucas Tupper</dc:title>
  <dc:description>A geometrical diagram showing a pair of arcs inside a larger arc, bisected by a straight line. Tupper uses this diagram to illustrate his theory that 'the centre of motion cannot lie anywhere in the cornea's axis excepting in the point where the visual line crosses it.'

Subject: Geometry / Optics</dc:description>
  <dc:date>1874</dc:date>
</rdf:Description>