The Royal Society read Letter L-122 of 1683-01-22 to Christopher Wren

February 17, 1683

Birch, History, vol. IV, p. 180, 7 February 1682/3 (O.S.) in London:

The translation of Mr. LEEWENHOECK's letter to Sir CHRISTOPHER WREN of January 22, 1682/3 was read, concerning generation from an animalcule, not an egg ; the muscles of a flea, and its testicles, the worm and nympha, the sting and wings of a gnat, and its feathers; the alteration made in the blood by sal volatile aleosum.