As I learned during my special training in England, the use of hand grenades was first introduced in warfare by the French, in 1667. The British did not use them until ten years later. After the battle of Waterloo the hand grenade was counted an obsolete weapon until the Japanese revived its use in the war with Russia. The rude grenades first used by the British in the present war weighed about eight pounds. To-day, in the British army, the men who have been trained to throw grenades--now of lighter construction and much more efficient and certain action--are officially known as “bombers” for this reason: When grenade fighting came back to its own in this war, each battalion trained a certain number of men in the use of grenades, and, naturally, called them “grenadiers.” The British Grenadier Guards, the senior foot regiment in the British Army, made formal complaint against the use of their time-honored name in this connection, and British reverence for tradition did the rest. The Grenadiers were no longer grenadiers, but they were undoubtedly the Grenadiers. The war office issued a formal order that battalion grenade throwers should be known as “bombers” and not as “grenadiers.” Up to the time when I left France we had some twenty-seven varieties of grenades, but most of them were obsolete or ineffective, and we only made use of seven or eight sorts. The grenades were divided into two principal classes, rifle grenades and hand grenades. The rifle grenades are discharged from a rifle barrel by means of a blank cartridge. Each grenade is attached to a slender rod which is inserted into the bore of the rifle, and the longer the rod the greater the range of the grenade. The three principal rifle grenades are the Mills, the Hales, and the Newton, the former having a maximum range of 120 yards, and the latter of 400 yards. A rifle discharging a Mills grenade may be fired from the shoulder, as there is no very extraordinary recoil, but in using the others it is necessary to fasten the rifle in a stand or plant the butt on the ground. Practice teaches the soldier how much elevation to give the rifle for different ranges. The hand grenades are divided also into two classes, those which are discharged by percussion, and those which have time fuses, with detonators of fulminate of mercury. The high explosives used are ammonal, abliste and sabulite, but ammonal is the much more commonly employed. There are also smoke bombs, the Mexican or tonite bomb, the Hales hand grenade, the No. 19 grenade and the fumite bomb, which contains white phosphorous, wax and petrol, and discharges a stream of liquid fire which will quickly burn out a dug-out and everything it contains. Hand grenades are always thrown with a stiff arm, as a bowler delivers a cricket ball toward the wicket. They cannot be thrown in the same manner as a baseball for two reasons. One is that the snap of the wrist with which a baseball