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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/AP/34/10/19" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Unpublished figures, 'Bi-sulphate of ammonia examined by polarised light' by William Bird Herapath</dc:title>
  <dc:description>Two figures in coloured ink, labelled figures 31-32, showing bi-sulphate of ammonia examined by polarised light with and without the 'red selenite stage'. The figures show two circles, each split into eight segments, with a diamond shape inside each segment.

Subject: Chemistry / Optics</dc:description>
  <dc:date>19 January 1854</dc:date>
</rdf:Description>