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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/EL/G1/4" 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 Regnier de Graaf to Henry Oldenburg, dated at Delft</dc:title>
  <dc:description>Defending his observations of the texture of the testicles against the objections of Timothy Clarke</dc:description>
  <dc:date>5 October 1668</dc:date>
</rdf:Description>