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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/25/3/8" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Copy letter, from Sir John Herschel to James David Forbes, dated at Slough</dc:title>
  <dc:description>Copy letter in John Herschel's hand. Suggests that James Forbes use his instruments to compare the force of solar radiation at high and low elevations. Delineates possible methods for this experimentation, and lists results of similar experiments. Includes further information on the actinometer.</dc:description>
  <dc:date>5 August 1832</dc:date>
</rdf:Description>