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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/MS/257/1/94" 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 Christopher Henyk Diderich Buys Ballot, Utrecht to Edward Sabine</dc:title>
  <dc:description>Ballot thanks Sabine for the kindness he has shown [Pieter Adrian] Bergsma. Ballot does not have the funds to establish photographic self-registering magnets [at Utrecht] but would like Sabine to procure a unifilar for him to measure the intensity. Ballot hopes to have a magnetical building this year, and discusses the instruments he would need for which purpose. Reference to Mr Richard [Christopher] Carrington’s observations, the perturbations at Kew, continually observing the suns disk. Ballot asks Sabine if he has any knowledge regarding a box sent from London containing meteorological instruments</dc:description>
  <dc:date>12 February 1860</dc:date>
</rdf:Description>