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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/4/246" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Letter, from David Brewster to Sir John Herschel, dated at Esk Hill by Roslin</dc:title>
  <dc:description>Autograph letter signed by sender. Regarding refraction in various crystals and comparison with Newton's tables. Suggests a joint paper on the subject. His parcel has never arrived. Is working on a paper on rotating phenomena.</dc:description>
  <dc:date>18 September 1819</dc:date>
</rdf:Description>