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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/LBO/29/105" 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 Dr Regnerus de Graaf, Delphi, to Henry Oldenburg</dc:title>
  <dc:description> ' ..  containing a further Vindication of his Sentiments on the Testicles, the Semen, and the Communicatin between the vasa deferetia and vesiculae seminales : and promising to send an unraveled Testicle, in order to Illllustrate his Doctrine. '</dc:description>
  <dc:date>22 February 1669</dc:date>
</rdf:Description>