Wrote Letter 33 of 1680-11-12 (AB 65) to Robert Hooke about blood globules, lees of wine, globules in rain water, milk vessels, reproduction, little animals in the male seed of animals, and their incomprehensible smallness

November 12, 1680
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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.

The original manuscript on seventeen quarto pages, written and signed by Leeuwenhoek, is preserved along with both figures at the Royal Society (MS. 1881. L 1. 62). It had eight drawings.