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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/CLP/2/38/3" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Diagram, axes and angles of refraction with speculum by [John Hadley]</dc:title>
  <dc:description>Diagram illustrating axes and angles of refraction of two lenses combined with a speculum.

Subject: Optics

Published in Philosophical Transactions as 'A proposition relating to the combination of transparent lens's with reflecting planes'.

Read to the Royal Society on 9 January 1734.</dc:description>
  <dc:date>[1734]</dc:date>
</rdf:Description>