Casing

A wooden tunnel for powder-hose in blasting; also the cast-iron case of converted guns. Casks — Round wooden ve els of more length than breadth, used in military operations, to form bridges acro rivers when no pontons can be had; also when filled with earth, may be used as gabions in an emergency. Casque — The French name for helmet and which, in ancient armor, was the name by which that head-piece was known. Also written cask.