Other arrangements are equally worthy of consideration. The bones of the shoulders not only give firm attachment to the upper extremity of the frame, but supply origins to the muscles of the arm and fore-arm. The free use of the hand, and the square form of the chest, are alike greatly owing to the clavicle, or collar-bone, which runs across from the breast-bone to the top of the shoulders. The scapula, or shoulder-blade, which is flat and triangular, lies on the ribs, is cushioned with muscles, shifts and revolves in its place with every movement of the arm, and has the power of moving upward and downward, backward and forward, so that when these motions succeed rapidly, the arm is rotated. The upper arm consists of a single bone, the head of which is hemispherical; standing obliquely backward from the bone, and received into a cavity with which the scapula is provided, it forms a ball and socket-joint. In this arrangement there is a provision for the rotating of the arm-bone on the scapula: thus the guards are made in fencing, and various similar movements are performed. In others the wrist has a finer and easier rolling, but this is from the motion of the radius and the ulna. How exquisite and wondrous, then, are the complicated, yet harmonious arrangements of the organic structure, by which the endless diversity of our manipulations is so effectually and happily secured! Nor must we pause even here; for what is it that directs the hand? It is the mind. The instruments of sense with which we are provided are employed by a being capable of volition. We thus pass from the palpable to the invisible. For that which feels and acts must be distinct from the body, unless the body itself feels and acts. But in as far as the body possesses a distinct organization of nerves for distinct purposes, as sympathy, feeling, and motion, and all the frame does not act together in feeling and volition, something besides the body must exist and operate. And it is mind which enables the man not only to contrive, but to execute. Without it, how useless; with it, when under the power of disease, how injurious, were the hand! But when mind is in healthy play, much may be effected by one hand, or even when the hands are never possessed or lost. On its due exercise the elevation of man is instrumentally and entirely dependent. Inferior creatures are endowed with an amazing power. We stand astonished and confounded at the phenomena of instinct. But that power is at once perfected. “The winged inhabitants of Paradise Wove their first nests as curiously and well As the wood-minstrels of our evil day.”