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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/AP/34/10/18" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Unpublished figure, 'Examined without the selenite stage but in polarised light by rotating a crystal through the whole circle of 360 degrees' by William Bird Herapath</dc:title>
  <dc:description>A figure in black and red ink, labelled figure 30, showing a circle split into 16 segments. Arrows around the circle show the direction of the 'arc of double refraction'.

Subject: Chemistry / Optics</dc:description>
  <dc:date>19 January 1854</dc:date>
</rdf:Description>