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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/18/155" 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 Wheatstone to Sir John Herschel, dated at Lower Mall, Hammersmith</dc:title>
  <dc:description>Autograph letter signed by sender. Will visit John Frederick William Herschel next week. Describes machine Charles Wheatstone will bring to illustrate undulatory theory of light.</dc:description>
  <dc:date>30 June 1849</dc:date>
</rdf:Description>