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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/14/221" 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 Adolphe Quetelet to Sir John Herschel, dated at Brussels</dc:title>
  <dc:description>Autograph letter signed by sender. Says John Frederick William Herschel's interest in Adolphe Quetelet's work has been source of motivation. Notes that on 21 September and 21 December, aurora borealis and magnetic perturbations have been spotted. Asks where to procure an actinometer in England.</dc:description>
  <dc:date>19 January 1841</dc:date>
</rdf:Description>