1. Pick up the grenade with the left hand. 2. Prepare to throw--face to the right and transfer the grenade to the right hand. 3. Take aim--left hand and arm extended up and straight toward the target, right hand and arm behind the thrower in the same plane as the left. 4. Withdraw pin with left hand. 5. Throw--use a straight overhead motion and do not bend the arm at the elbow. It is not a baseball throw. The tendency for most of us Americans is to follow a perfectly natural habit--try to use the baseball throw. This is to be discouraged for several reasons, the chief one being that the grenade weighs about a pound and a half, whereas our baseball weighs only a third of this amount. Then, too, it often happens in the trenches that a grenade duel will last for hours. Under such circumstances the last grenade may decide the issue and endurance will be a mighty telling factor. Hence, the insistence upon the overhead throw. The preliminary throwing should take place in the open but always with a definite target, an outline of a section of trench being the best sort of target. Another excellent idea is to have a target arranged according to the diagram shown herewith and to keep score. This procedure will also add incentive for competition and will produce results. After men have thrown in the open for a sufficient period, they should proceed to the next stage: This is the stage of throwing in a cage or from behind and over obstacles. There are three distinct phases of this feature of the training: (1.) The thrower sees the target but must throw over an obstacle. (2.) The target is invisible; the thrower is aided by an observer and a periscope; the observer notes the fall of the grenades and gives directions as follows--"So many yards right or left" or "Shorten or lengthen so many yards." (3.) Actual throwing in trenches. This stage immediately precedes that of "working up a trench."