The Royal Society published Leeuwenhoek's letter of October 9, 1676, reporting microbes in infusions

Date: 
March 25, 1677

A long extract from the letter written on October 9, 1676, reporting observations of microbes in spice infusions, was published in Philosophical Transactions, vol. 12, no. 133. Oldenburg translated it himself, but included less than half of the original. In retrospect, we see this as Leeuwenhoek's most important publication because it introduced us to the microscopic world.

Volume 12 number 135 is dated January 1, 1677. The other nine numbers, 133, 134, 136-142, are dated March 25. It is doubtful that that were all issued at once. Also, the first numbers of volume 13 was not published until January 1683, six years later.

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