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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/16/372" 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 Sir John Herschel to Mary Somerville, dated at Collingwood</dc:title>
  <dc:description>Autograph letter signed by sender. Comments on the political change within Italy. Answers questions about spectrum analysis, spectra of nebulae, and [solar] 'willow leaves.' Says the view of universe as a collection of billiard balls is problematic. Includes postscript from John Frederick William Herschel's daughter Bella describing family events.</dc:description>
  <dc:date>11 April 1865</dc:date>
</rdf:Description>