The Royal Society read another part of Letter 48 of 1686-01-22 about gunpowder explosions and cannon lengths

Date: 
May 8, 1686
Document: 

Birch, History, vol IV, p. 479, 28 April 1686 (O.S.) in London:

Part of a letter from Mr. LEEWENHOECK was read, containing his observations upon the figure of the parts of the nitre after the explosion of the gun-powder; with several curious remarks about the manner of firing gun-powder, about the quantity of air produced by the blast, and about the length of a cannon to carry farthest.

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