Wrote Letter L-003 of 1673-11-08 to Henry Oldenburg about globules in milk and in blood and his theory on the structure and growth of hair and of tumours
Date:
November 8, 1673
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 is not preserved at the Royal Society.