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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Leeuwenhoek's number: 
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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

The original manuscript on six folio pages, written and signed by Leeuwenhoek, is preserved at the Royal Society (MS. 1841. Early Letters L1.13). It includes three smaller sheets of figures attached to the fifth manuscript page.

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.