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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/9/192" 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 Basil Hall to Sir John Herschel, dated at Portsmouth</dc:title>
  <dc:description>Autograph letter signed by sender. Wishes John Frederick William Herschel would lay hands on the memorandum concerning the Zenith observatory on Etna. Explains why John Frederick William Herschel's theories regarding a point in gunnery do not work in actual practice. Queries the measurement given by John Frederick William Herschel for the height of Etna.</dc:description>
  <dc:date>3 November 1840</dc:date>
</rdf:Description>