The Royal Society read part of Letter L-186 about the structure of teeth

April 23, 1687

Birch, History, vol IV, p. 531, 13 April 1687 (O.S.) in London:

Part of Mr. LEEWENHOECK's letter of April 4, N.S. was read concerning the structure of the teeth, which he found from microscopical observations in all animals to be made up of bony vessels and pipes which all take their rise from the inside or cavity of the teeth; and that all these vessels have their particular blood-vessels, that feed them, and convey nourishment to them. And the obstruction of these bony pipes he conceived to be the cause of the rotting of the teeth and the exceedingly acute pain of the tooth-ach. The rest of the letter was ordered to be translated.