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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/23/387" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Copy letter, from Sir John Herschel to Joseph Whitworth, dated at Collingwood</dc:title>
  <dc:description>Copy of a letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Quotes report of limitations in Joseph Whitworth's new artillery shell for penetrating ironclad vessels. Recounts John Frederick William Herschel's [Apr. 1836] experiments at Cape of Good Hope to increase explosive power of gunpowder by adding [Luke] Howard's fulminating mercury.</dc:description>
  <dc:date>27 September 1862</dc:date>
</rdf:Description>