Volumes 18, 19, and 20 of Alle de Brieven / Collected Letters became available at the end of 2024, completing the series begun in 1939. Download for free.
Which number?
Master list (pdf) of all 602 L-numbers, their Leeuwenhoek number, and their Collected Letters number
Wrote Letter L-484 of 1711-12-29 to Anthonie Heinsius to refute an article in Philosophical Transactions; he calculates the quantity of blood propelled by each heartbeat and estimates how often the total blood volume circulates through the body
Date:
December 29, 1711
The original manuscript on seven quarto pages, written and signed by Leeuwenhoek, is preserved at The Hague, Nationaal Archief, Archief Anthonie Heinsius (toeg. nr. 3.01.19, inv.no. 1613).
