Wrote Letter L-413 of 1703-11-03 to the members of the Royal Society about the liver fluke in soil from meadows, worms and other little animals in soil, and a theory about how they propogate

November 3, 1703
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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 about …

Liver fluke in the earth of meadows. Worms, rotifers, and other micro-organisms from the earth. Theory about how these animals move between water and earth.

On the occurrence of the liver fluke in the earth of meadows, whether soggy or not. On worms, rotifers, and other animals from the earth. A theory about the spread of such animals.