| Description | Signed autograph
Analysis of a hog's bristle; discussion of shedding hair; observing blackheads; examination of Leeuwenhoek's faeces when he had diarrhoea; discussing micro-organisms in human faeces, and several other animals; examining the structure of clay; the possibility that a blood transfusion can cure gout
Four figures of hog's bristle are in red chalk
Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 3, p 345 |
| Place origin | Delft, South Holland, (United Provinces) Netherlands |