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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/14/92" 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 Charles Pritchard to Sir John Herschel, dated at Freshwater</dc:title>
  <dc:description>Autograph letter signed by sender. Compares W. L. Newman's and Charles Pritchard's calculations of optical coefficients to those in John Frederick William Herschel's work. Sends John Frederick William Herschel formulae and tables for calculating telescopic lens thickness and shape in relation to the dimensions of the telescope. Wishes John Frederick William Herschel luck on Iliad.</dc:description>
  <dc:date>9 November 1864</dc:date>
</rdf:Description>