<?xml version="1.0" encoding="utf-8"?>
<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/13/404" 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 Henry Piddington to Sir John Herschel, dated at Calcutta</dc:title>
  <dc:description>Autograph letter signed by sender. Uses the barometer for measuring both vertical and horizontal distances, and believes the rotation of cyclones may be connected to the sunspot activity.</dc:description>
  <dc:date>23 May 1848</dc:date>
</rdf:Description>