Philosophical Transactions, vol. 31, no. 366 published, including Letter L-566

Date: 
January 11, 1721

The date is New Style, which was eleven days ahead of the Old Style date of 31 December 1720 used in London.

Sources
Year Author Title
1665 various Philosophical Transactions
1720 Leeuwenhoek, A. van Observations upon the Bones and the Periosteum, in a Letter to the Royal Society, from Mr. Leeuwenhoek, F. R. S.