_Is not this equally true of the body?_ Is the body one single organ, which, if exercised, is sure to grow in the right way? On the contrary, is it not an exceedingly complicated machine, the symmetrical development of which requires discriminating, studied management? With the thoughtful mind, argument and illustration are scarcely necessary; but I may perhaps be excused by the intelligent reader for one simple illustration. A boy has round or stooping shoulders: hereby the organs of the chest and abdomen are all displaced. Give him the freedom of the yard and street,--give him marbles, a ball, the skates! Does anybody suppose he will become erect? Must he not, for this, and a hundred other defects, have special training? Before our system of education can claim an approach to perfection, we must have attached to each school a professor who thoroughly comprehends the wants of the body, and knows practically the means by which it may be made symmetrical, flexible, vigorous, and enduring. Since we have, unhappily, become a military people, the soldier's special training has been much considered as a means of general physical culture. Numberless schools, public and private, have already introduced the drill, and make it a part of each day's exercises. But this mode of exercise can never furnish the muscle-culture which we Americans so much need. Nearly all our exercise is of the lower half of the body: we walk, we run up and down stairs, and thus cultivate hips and legs, which, as compared with the upper half of the body, are muscular. But our arms, shoulders, and chests are ill-formed and weak. Whatever artificial muscular training is employed should be specially adapted to the development of the upper half of the body. Need I say that the military drill fails to bring into varied and vigorous play the chest and shoulders? Indeed, in almost the entire drill, are not these parts held immovably in one constrained position? In all but the cultivation of erectness, the military drill is singularly deficient in the requisites of a system of muscle-training adapted to a weak-chested people. Dancing, to say nothing of its almost inevitably mischievous concomitants, brings into play chiefly that part of the body which is already in comparative vigor, and which, besides, has little to do directly with the size, position, and vigor of the vital organs. Horseback exercise is admirable, and has many peculiar advantages which can be claimed for no other training; but may it not be much indulged while the chest and shoulders are left drooping and weak? Skating is graceful and exhilarating; but, to say nothing of the injury which not unfrequently attends the sudden change from the stagnant heat of our furnaced dwellings to the bleak winds of the icy lake, is it not true that the chest-muscles are so little moved that the finest skating may be done with the arms folded?