Wrote Letter 22 of 1677-11-09 (AB 35) to William Brouncker

November 9, 1677
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Text of the letter in the original Dutch and in English translation from Alle de Brieven. The Collected Letters at the DBNL - De Digitale Bibliotheek voor de Nederlandse Letteren

Leeuwenhoek wrote this letter, sent in Latin translation, to William Brouncker about sperm in human semen. It is the first detailed description, but indicates no understanding of its function. In it, Leeuwenhoek mentions the role of both Theordore Craanen and Johan Ham.

Twenty years later, he quoted an excerpt from this letter in Dutch when he wrote to Harman van Zoelen to defend himself against Nicholas Hartsoeker.