The arte of gunnerie. Wherein is set foorth a number of seruiceable secrets, and practical conclusions, belonging to the art of gunnerie, by arithmeticke skill to be accomplished: both pretie, pleasant, and profitable for all such as are professors of the same facultie. / Compiled by Thomas Smith of Barwicke vpon Tweed souldier.

Example.

Admitte a Culuering of sixe inches diameter is in length in the bore thereof 20 times that measure (that is 10 foote long,) then I say that the plankes of her ca∣ryage ought to be 15 foote in length; and at the fore end next the peece 2 foote in breadth, and in the midst one foote three quarters, and at the lowest end next the ground one foote and a quarter: and in thicknesse halfe a foote. Also euery caryage ought to haue foure tran∣somes, and ought to be strengthened with strong yron boltes.

The holes or centers wherein the trunions ought to lye, ought to be three times and ½ the diameter from the fore end of the caryage, and in depth ⅔ parts of the thicknesse of the trunions, which depth you may easily find out, as thus: take the height or diameter of the tru∣nions, and multiply the same measure by 2, and de∣uiding by the denominator 3, the quotient will shew your desire.