At age 68, his 50th publication in Philosophical Transactions

Date: 
August 1, 1701

At age 68, his 50th publication in Philosophical Transactions, volume 22, number 273 (August 1701): the Causes of the Different Tastes of Waters and Edge of Razors

Sources
Year Author Title
1665 various Philosophical Transactions
1701 Leeuwenhoek, A. van A Letter from Mr Antony van Leeuwenhoek, F. R. S. to Mr Chamberlaine, concerning the Causes of the Different Tastes of Waters and Edge of Razors