5 of convenient size. The operator sits down usually on a box or a rough block of wood; upon his left leg, above the knee, is tied a thick pad, upon which he lifts one of the great masses of flint, and, with a quartering-hammer, consisting of a heavy iron head and short handle, he breaks up the hardest flint as easily as if it was so much chocolate. Now there is a reason for this, which is one of the greatest importance as showing how pre-historic man must have gone to work. If the flint be placed on the ground and broken with a hammer, it would not only be an exceedingly difficult operation, but, when broken, it would have a rough, splintery fracture in all directions, rendering the. flint useless for anything. But, by adopting the former method, an elastic rebounding blow is obtained, which not only breaks the flint with the greatest ease, but it does it in exactly the spot the operator wishes, and with a clean, even fracture. One may sometimes see, at country fairs, men who make a show of strength by breaking stones with their fist. The "knack" followed by them is practically the same as that which enables the gun-flint maker to break up his flint, and it was also known to pre-historic man in the making of his flint implements. When a sufficient quantity of flint has been "quartered," the operator replaces the thick pad on his leg by a piece of leather, and taking up one of the pieces of flint, places it thereon, and proceeds to flake it up by means of another hammer somewhat similar in shape to a quartering-hammer, but smaller, the head being only about three inches long. The mode of proceedure is as follows: the piece of flint is held firmly on the leg by the left hand, a smooth surface being presented to the hammer, and the worst or most useless part of the flint being used to hold it by, so as not to waste any good material. The hammer is now used to crush off any crust or useless rough edges, and when this is done, a slight tap of the hammer about a quarter of an inch from the edge of the flint strikes off a curious, knife-shaped piece of flint, whose length is equal to the thickness of the lump operated upon. The point where