Wrote letter of 1711-08-15 (AB 286) to Anthonie Heinsius

August 15, 1711
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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