Wrote Letter L-024 of 1675-03-26 to Henry Oldenburg about meals, seeds, and pearls; transparency; movement of fluids in plants and animals

March 26, 1675
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Text of the letter in the original Dutch and in English translation from Alle de Brieven. The Collected Letters at the DBNL - De Digitale Bibliotheek voor de Nederlandse Letteren

Leeuwenhoek wrote this letter to Henry Oldenburg about:

marrow fats, peas, runners

structure of venous blood from a pregnant woman

explains the transparency in objects

an account of the circulation in oak leaves and compares it to veins in humans. The circulation of sap in an oak-leaf.

An examination of the veins in the connective tissue between the muscles, and of the manner in which these muscles are nourished by the blood.

Explains his drawing of a louse's leg. Figure of a louse's leg, the vein of an oak leaf and an ink impression of oak leaves.