content_output-061_5 (Q6373)

Numerous weapons of a compound character were made in the fifteenth century; for instance, one large cannon with one of smaller bore on each side, or above or below. In mortars the most notable are those which fire three or more projectiles at the same time; these were fired simultaneously by means of a common touch-hole communicating with each chamber. One of nine chambers is in the Tower, and another of thirteen is illustrated by Grose.