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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/18/351" 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 Thomas Young to Sir John Herschel, dated at 48 Welbeck St.</dc:title>
  <dc:description>Autograph letter signed by sender. Gives diagram and explanation of Thomas Young's reduced parallax. John Frederick William Herschel's formula is elaborate but complicated. Thomas Young's formula is less exact but easier for public to use. Welcomes criticism.</dc:description>
  <dc:date>1820 or 1825-2-18</dc:date>
</rdf:Description>