The art of gunnery. Wherein is described the true way to make all sorts of gunpowder, guu-match [sic], the art of shooting in great and small ordnance: excellent ways to take heights, depths, distances, accessible, or inaccessible, either single or divers distances at one operation: to draw the map or plot of any city, town, castle, or other fortified place. To make divers sorts of artificiall fire-works, both for war and recreation, also to cure all such wounds that are curable, which may chance to happen by gunpowder or fire-works. This treatise is composed for the help of all such gunners and others, that have charge of artillery, and are not well versed in arithmetick and geometry : all the rules and directions in this book, being framed both with and without the help of arithmetick. By Nathanael Nye mathematician, master gunner of the city of Worcester.

To work the last proposition by the Table.

First, In place of multiplying 6 cubical∣ly, finde 6 in the Table, and right against it you shall have 216, which is the cube of 6; then finde 7 likewise under the title Root, and under the title Cube you shall finde 343, the Cube of 7; then consider, that so much as 216 is in proportion to 343, the like proportion 30 is to 47 pounds and ten ounces.

There is much about seven cube inches of iron in one pound; by this rule you may finde 7 thirty times in 216 and 7; you may finde seven to be contained in 343, just forty nine times, but this rule is not so per∣fect as the former, because in subtracting seven out of 216, you shall finde thirty pounds and 6/7 parts, which is too much by the fraction.