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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/HS/22/55" 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 Augustus De Morgan, dated at Collingwood</dc:title>
  <dc:description>Copy of a letter. Thanks Augustus De Morgan for a correction in one of John Frederick William Herschel's writings; tries to explain the partial echo that occurs when blowing across the end of an open pipe.</dc:description>
  <dc:date>26 June 1840</dc:date>
</rdf:Description>