In the whole Crimean campaign, the total number of British wounded amounted to 11,361, exclusive of men killed in action. =Spent balls.=—In connection with degree of velocity, the subject of what are called “spent balls” naturally occurs. After a cannon–ball has ceased to pursue its course through the air or to proceed by ricochet, it not unfrequently travels to a considerable distance, rolling along the surface of the ground. When its rate of movement is not much faster than that at which a man can walk, and when to all appearance it might be stopped by the pressure of the foot as readily as a cricket–ball, it yet possesses the power of inflicting serious injury on such an attempt being put into execution. This power is easily understood if the amount of force is remembered which must still be inherent in the cannon–ball for it to overcome the inertia of its own mass, and the resistance to which it is exposed in passing over the ground on which it is rolling. It is this force, multiplied by the weight of the ball, which gives it the destructive power. If this ball is brought into collision with the foot of a person, such destruction ensues as generally to necessitate amputation. Should it impinge on other parts of the body, as in the instance of a man lying on the ground, it may cause mortal injury to internal organs, and that without exhibiting external evidence of the amount of injury it has inflicted. So, also, though powerless to carry away a limb, it may cause comminuted fractures of bones and extensive contusions of the softer structures. =Lodgment of balls.=—Low rate of velocity leads to musket and other balls lodging in various parts of the body. When the smooth–bore musket was in common use, lodgment of balls was of frequent occurrence. In the first place, from absence of sufficient initial velocity to effect its passage out of the body, and, secondly, from its liability to be diverted from a direct line, a round ball might be arrested in its progress at any distance from its point of entrance. Conical balls lodge when their velocity has become nearly expended before entering the body; or, from peculiarity in the posture of the person wounded, a ball, having had force enough to traverse a limb, may afterward enter into another part of the body and lodge. A ball may reach a part so deep in the muscles of the back, for example, or be so far removed from the aperture of entrance, as to elude all attempts on the part of the surgeon, at the time of examination of the wound, to discover its retreat. Or it may have reached some position from which the surgeon fears to take the necessary steps for its extrication, judging the additional injury that would thus be inflicted more mischievous than the probable effects of allowing the ball to remain lodged.