Wrote Letter L-178 of 1686-07-10 to members of the Royal Society about the growth and durability of wood felled in different seasons and countries, the annual growth rings, and how wooden barrels can be made watertight

July 10, 1686
Standard reference information
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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.

The original manuscript on 12 quarto pages, written by a copyist and signed by Leeuwenhoek, is preserved at the Royal Society (MS. 1915. Early Letters L2.6). Included are two figures, one in red chalk and the other in ink, pasted onto a folio page. An English translation by Francis Lodwick is found at Early Letters L2.7.

An excerpt was published in Philosophical Transactions, vol. 18, no. 213, dated 31 October 1694. See Publication history below.