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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/20/78" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Copy of draft letter, from Sir John Herschel to Jean Baptiste Biot</dc:title>
  <dc:description>Copy of draft letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Answers to Jean Baptiste Biot's queries on the refraction of light through crystals, and Newton's rings.</dc:description>
  <dc:date>10 December 1819</dc:date>
</rdf:Description>