Philosophical Collections number 7 published in London, including Leeuwenhoek's Letter L-119 of 1682-04-04

April 1, 1682

This number is dated only by the month, not the day. It included a letter from Leeuwenhoek dated April 4, so it must have been published several weeks after that.

This was the last number of Philosophical Collections. Of the seven numbers, Hooke published a letter from Leeuwenhoek in five of them.