At age 74, his 75th publication in Philosophical Transactions

Date: 
July 1, 1707

At age 74, his 75th publication in Philosophical Transactions, volume 25, number 311 (July, August, and September 1707): Particles of Silver Dissolved in Aqua Fortis, etc.

Sources
Year Author Title
1665 various Philosophical Transactions
1710 Leeuwenhoek, A. van A Letter from Mr Anthony van Leeuwenhoek, F. R. S. Containing Some Microscopical Observations upon the Chrystalized Particles of Silver Dissolved in Aqua Fortis