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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/19/311" 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 Hubert Airy to Sir John Herschel, dated at Flamsteed House, Greenwich</dc:title>
  <dc:description>Autograph letter signed by sender. Describes difficulties in producing glass pen and attaching it to pendulum to produce precise curves for aligning equatorial [telescope mount]. Sent artistic sample to John Frederick William Herschel's wife.</dc:description>
  <dc:date>9 May 1870</dc:date>
</rdf:Description>