Wrote letter of 1711-08-15 (AB 286) to Anthonie Heinsius
The original manuscript on one quarto page, written and signed by Leeuwenhoek, is preserved in The Hague at the Nationaal Archief, inv. nr. 1613.
This letter accompanied:
- an issue of the Philosophical Transactions that had a letter by Leeuwenhoek on the pulse
- copies of notes on gold from Guinea and on hailstones