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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/EL/L1/39a" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Photocopy of a letter, from Antoni van Leeuwenhoek to Nehemiah Grew, dated at Delft</dc:title>
  <dc:description>Examination of blood and saliva to discover if they contain living organisms; an account of liver-flukes and the origins of the disease in sheep; observations of the sperm of cod
One positive and one negative copy attached. Original can be found in The National Archives, Kew. This letter never reached the Royal Society. It was found by Miss Petra Beydals of Delft.
Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 2, p 409</dc:description>
  <dc:date>21 February 1679</dc:date>
</rdf:Description>