Wrote Letter L-292 of 1696-07-06 to Nicolaas Witsen about his analysis of the mineral that Witsen sent with Letter L-291, ant stings, and lacquer particles on a tree that originate from the tree itself, not from ants

July 6, 1696
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Text of the letter in the original Dutch and in English translation from Alle de Brieven. The Collected Letters at the DBNL - De Digitale Bibliotheek voor de Nederlandse Letteren

Leeuwenhoek wrote this letter about …

Analysis of a mineral from Tartary by melting. How gold and silver already got into a mineral from a Sumatran mine during the creation of the earth. About the increase of metals in ores owing to vapours forced up from the earth. Ants sting with a sting, not with their mouth; lacquer particles on a tree originate from the tree itself, not from ants.