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.
Resolution.
Multiply 4 the number of peeces first propounded by 2, the times they were discharged, ariseth 8, by which de∣uide Page 41 240 the number of pounds in powder spent, the quotient is 30 pound, and so much powder did euery Cannon fire at one shoote. Or else you may multiply the other 5 Cannons by the times they were discharged, and deuiding that product by the powder spent, you shall haue 30 pound weight of powder in your quotient also.
