Wrote Letter L-480 of 1711-08-18 to James Petiver about the sperm of young rams and to explain what happened when Petiver tried to visited
Date:
August 18, 1711
The original manuscript on five quarto pages, written and signed by Leeuwenhoek, is preserved at the Royal Society (MS. 2089. L 4. 38).
On the cover, Leeuwenhoek wrote, "Aande Heer. d'Heer James Petiver, lid vande Coninklijke Societeit. In London."