_Gun-shot wounds._ Long after the invention of gunpowder, Surgeons continued to entertain very vague opinions respecting the nature of wounds produced by it; some considered that the injured parts were either dreadfully burnt by the heat of the projected body, or were irritated by the presence of poison, communicated to them by the powder. _Thomas Gale_, who served as a Surgeon in the army of _Henry_ 8th, at Montreuil in 1554, was the first to refute the absurd opinions of “the poisoning, burning, and conquassation of gun-shot wounds.” A gun-shot wound is now defined “a violent contusion, with, or without a solution of continuity, suddenly and rapidly effected by a solid body projected from fire-arms.” If a musket or pistol ball has struck a fleshy part, without injuring any material blood-vessel, we see a hole about the size of, or smaller than the bullet itself; with a more or less discoloured lip forced inwards, and if it has passed through the parts, we find an everted edge, and a more ragged, and larger orifice at the point of its exit; the pain in this case is so inconsiderable that the wounded person is frequently not aware of his having received any injury. The course of balls is frequently most extraordinary, and it behoves the judicial surgeon to keep in mind a fact which may often throw considerable light upon the subject of his investigation. A ball will often strike the thorax or abdomen, and, to an inexperienced eye, appear to have passed directly across, or to be lodged in one of the cavities. If great difficulty of breathing or hemorrhage from the mouth, with sudden paleness and laborious pulse, in the one case, or deadly faintness, coldness of the extremities, and the discharge of stercoraceous matter from the wound, in the second, are not present, we shall perhaps find that the ball has coursed along under the integuments, and is marked in its progress either by a redness, which Mr. _Hunter_ compared to a blush, or by a wheal, or dusky line, terminated by a tumour, on the opening which it will be easily extracted. In some of these long and circuitous routes of balls, where we have not this mark, a certain emphysematous crackling discovers their course, and leads to their detection. The ball is in many instances found very close to its point of entrance, having nearly completed the circuit of the body. In a case related by Dr. _Hennen_, as one that occurred to a friend of his in the Mediterranean, the ball, which struck about the _Pomum Adami_, was found lying in the very orifice at which it had entered, having gone completely round the neck, and being prevented from passing out by the elasticity and toughness of the skin which had confined it to this circular course. This circuitous route is a very frequent occurrence, particularly when balls strike the ribs, or abdominal muscles, for they are turned from the direct line by a very slight resistance indeed,