| Description | Signed autograph
Examination of the brain of a turkey, sheep, ox, and sparrow; measuring blood vessels in the human eye using grains of sand; discussion of moxa, Chinese remedy for gout; observations of lepers in Harlem and examinations of their skin; examination of the skin of eels
Original figures now no longer exist
Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 4, p 253
English extract printed in 'Philosophical Transactions', vol 15, no 168, p 883 |
| Place origin | Delft, South Holland, (United Provinces) Netherlands |