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.
Smith, Thomas, fl. 1600-1627.
Example.
Suppose the circumference of the one bullet be 16 inches, and the circumference of the other 26 inches, in working as aboue is taught, I find the diameter of the lesser bullet is 5 inches 1/11 and the diameter of the greater bullet 8 inches 4/11, so abating the lesser from the greater, the remaine is 3 inches and 3/11 partes of an inch, shewing the greater bullet is so much in height more then the lesser. The like is to be obserued with any other.
By this rule you may know how much the circumfe∣rence or any part of your peece is higher then another.
