Wrote Letter 60 of 1687-11-28 (AB 105) to Members of the Royal Society about his discovery that cochineal was an insect and his experiments with cinchona bark

Date: 
November 28, 1687
Standard reference information
Cole's number: 
60
AB/CL number: 
105
AB/CL volume: 
7

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, written and signed by Leeuwenhoek, is preserved at the Royal Society (MS. 1926, EL.L2.17).