Wrote Letter L-012 of 1674-07-06 to Henry Oldenburg bout sweat, hair, fat, tears, and improved capillary tubes

Date: 
July 6, 1674
Standard reference information
L-number: 
L-012
Leeuwenhoek's number: 
5
Collected Letters number: 
9
Collected Letters volume: 
1

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 (Leeuwenhoek's copy that he re-sent after the original was lost in transit) on six folio pages, written and signed by Leeuwenhoek, is preserved at the Royal Society (MS. 1833. Early Letters L1.5).

An excerpt was published in Philosophical Transactions, vol. 9, no. 106, dated 21 September 1674. See Publication history below.

Leeuwenhoek wrote this letter to Henry Oldenburg about sweat, hair, fat, and tears; improved capillary tubes.

Human and horse sweat. Structure of human and animal hair. The motion of blood in narrow glass-pipes. The structure of fat in cows, sheep and fish. Figures of glass-pipe in the margin.

He mentions that he sent his letter of 1674-06-01 along with glass tubes and specimens via Adriaen Nicolaesz Boogaert (1644-1708), lord of Belois, Delft magistrate, mayor, and manager of the V.O.C., married 25-10-1656 Delft to Anna Briel (1639-1688).