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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/14/477" 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 S. Alexander Renshaw to Sir John Herschel, dated at New Basford</dc:title>
  <dc:description>Autograph letter signed by sender. Desires advice on construction of glass prisms for Newtonian reflecting telescopes. Also asks how to test the parabolic figure of a glass speculum before silvering.</dc:description>
  <dc:date>10 March 1869</dc:date>
</rdf:Description>