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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/MOB/016" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Aerial telescope parts by Christiaan Huygens</dc:title>
  <dc:description>Three glass lenses designed by Christiaan Huygens for his aerial telescope, of focal length 210ft. (RS No 240), 170ft (RS No 23) and 122ft (RS No 22), each in a mahogany carry case. Iron cylinder with wooden spar for carrying the object glass.</dc:description>
  <dc:date>1691</dc:date>
</rdf:Description>