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
Brass single-lens microscopes
Shown here in order of decreasing magnifying power of the lens. Chronology is not known.
266x
118x
112x
110x
74x
no lens
De microscopische nalatenschap van Antoni van Leeuwenhoek
Author:
Houtzager, H. L.
Journal:
Historisch Jaarboek voor Delft
Volume:
Jaarboek 1991
Publisher:
Delft: Genootschap Delfia Batavorum
Year:
1991
Silver single-lens microscopes
Shown here in order of decreasing magnifying power of the lens. Chronology is not known.