Pontoon

A form of pontoon constructed in localities where plank and boards can be conveniently procured, the box being covered with pitched canvas. c Respirator. — A mask used as a protection against poisonous gases, such as chlorine (affecting the lungs), pru ic acid (affecting the nerves), tear shells (affecting the eyes) and mustard oil gas (affecting the skin). It consists of a small canvas haversack, called a satchel, of two compartments, one of which contains the metal filter with its charge of chemicals: the other, the mask, called the face piece, is made of rubberized material with mica eyepieces, a nose clip and a rubber mouthpiece. —Winding or zigzag approaches dug to form a path or communication between the different armed trenches of a siege-work, and to prevent them from being enfiladed or fired upon in flank. piece of defensive armor for the arm. Bracelets and armlets have been used by every nation, both savage and civilized. t.— In gunnery, a space in the direction of range, the limits of which are determined by firing. A target is said to be enclosed in a 100 yard bracket when, of two ranges -differing from each other by 100 yards, one is over and the other is short of the target; also, the cheek or side of an ordnance carriage. Bracketing Salvo — A salvo is termed bracketing when one half of the shots fall short and the other half over the target Bracket-trail. — The trail formed by the body of the bracket trail carriage consisting of two brackets, connected together by three transoms.