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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/14/392" 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 Alexander Rogers to Sir John Herschel, dated at Bridge St., Leith</dc:title>
  <dc:description>Autograph letter signed by sender. Discusses problem of the ellipse and offers a method of solving it. States the proper boundary of a front mirror is too difficult to ascertain. Still having problems with teaching.</dc:description>
  <dc:date>25 March 1809</dc:date>
</rdf:Description>