a method of preparing iron, so as to render its outer surface hard, and capable of resisting any edged tool.

This is a lesser degree of steel-making, and is practised by baking, calcination, or cementation in an oven or other close vessel, stratified with charcoal and powdered hoofs and horns of animals, so as to exclude the air. See STEEL.

CASE-SHOT, in the military art, musket-ball, stones, old iron, &c. put into cases, and shot out of great guns.