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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/MOB/050" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Portable mountain barometer</dc:title>
  <dc:description>Portable mountain barometer used by Charles Darwin in geological work during the voyage of HMS 'Beagle'. The instrument is contained in a mahogany tube with a thermometer at the base. It has a silvered scale, graduated to 19 to 31 inches. The tube has a brass guard and a near-centre ivory band. There is a brass hanging ring at the top with a Vernier operating screw. </dc:description>
  <dc:date>c.1831</dc:date>
</rdf:Description>