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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/19/222" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Instructions on use of sextant, by Basil Hall</dc:title>
  <dc:description>Handwritten instructions on the use of the sextant for astronomical observations at sea, entitled "memos", signed and dated by Basil Hall. Detailed cleaning instructions, pairing with telescope, handling and reduction of errors in reading. </dc:description>
  <dc:date>24 April 1833</dc:date>
</rdf:Description>