Their general utility will be questioned only by those who are not aware that the health and vigour of all the bodily organs depend on the proportioned exercise of each. In active exertion, the member exercised swells with the more frequent and more copious flow of blood, and heat is developed in it with greater abundance; and if we repeat the same motions many times after intervals of repose, all the muscles exercised become permanently developed; a perfection of action ensues in the member exercised, which it did not previously possess, any deformity by which it is affected is corrected, and strength and activity are acquired. That man, therefore, gains the most strength who engages in muscular exercises that require the application of much power, but which are sufficiently separated by intervals of repose. It must be remembered, however, that, in exercising particular muscles only, the others become weak. The strength of Marshal Saxe was sufficiently great to stop a chariot drawn at speed by four horses, by merely seizing the wheel: he bent pieces of silver with his fingers, made them into boats as he would with paper, and presented them to the ladies. Count Orloff, a Russian general, broke the shoe of a carriage horse in the same manner; and there are innumerable examples of similar feats of extraordinary strength. Active exercises, at the same time, confer beauty of form; and they even contribute to impart an elegant air and graceful manners. If the exercise of a limb be continued for some time, the member swells, a painful sensation is experienced, which is termed lassitude, and a difficulty of contraction, which is the result of it. If the motion has been excessive, and the organic elements in the member have been acted upon beyond all physiological laws, inflammation would take place, and its functions be performed with great difficulty, if at all. Such are the effects of exercise on the locomotive system, to all the functions of animated beings, so long as they are exercised with moderation, equality, and at due intervals, working for their own preservation. Of course, the general effect of active exercises is marked in proportion to the number of parts that share in the motion, or are brought into energetic action. In general exercise, the increase of organic action is not confined solely to the parts which are the seat of muscular contraction, but is repeated throughout all parts of the economy, and influences all the functions.