Bombs

Gunnery, large shells of cast iron, having large vents to receive the Fusees B are made of wood, and drove full of a Composition made of metal powder, sulphur and Salt-peter. After the Bomb has been fill’d with this powder, the fusee is driven into the vent within an inch of the head, and pitch’d over to preserve it, they uncase the fusee E, when they put the bomb into the mortar and salt it with meal-powder, which having taken fire by the flash of the powder in the chamber of the mortar, burns all the time the bomb is in the air, and the composition in the fusee being spent, it fires the powder in the bomb, which breaks the bomb with a great force, blowing up whatever is about it, and the great height it goes in the air, and the forces with which it falls, makes it go deep in the earth.