Wrote letter of 1679-05-11 (AB 45) to Lambert van Velthuysen

May 11, 1679
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Information about 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.

This letter was never published. In it, Leeuwenhoek wrote about "the figures of plants visible in seeds; of the spiral vessels in seeds, in wood, and in other parts of plants; of mould on old leather and its formation; of leukorrhea."

This quotation comes from Harting's Gedenkboek for the 1875 exhibition in Delft. Leukorrhea is how the editors of Alle de Brieven / Collected Letters translated witten vloed, literally, "whitening flood". They also note that the signed letter had "Three folio pages. With drawings." It is not clear from the Gedenkenboek how the editors knew that.

Harting was exhibiting his copy of this letter, listed as item #48 on page 124 and briefly summarized. At the time, the letter was in the possession of J. van Dam van Noordeloos, of Rotterdam, but has since gone missing.