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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/AP/56/5/2" 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Unpublished diagram, experimental setup of Franciscus Donders by John Lucas Tupper</dc:title>
  <dc:description>Tupper reproduces an illustration of an experiment of Donders' relating to the refraction of a beam of light, showing a light ray incident on a curved surface or arc. Tupper shares the diagram 'with its proportions, to show that the scale of the arc is, in fact, inadequate'.

Subject: Optics</dc:description>
  <dc:date>1874</dc:date>
</rdf:Description>