The Greeks put on their belts before they commenced wrestling; and many physicians, both ancient and modern, recommend the use of belts, as being to the whole of the body, and to the parts over which they are placed, what the exterior sheaths or aponeuroses are to the muscles--bands which embrace and keep firm the parts over which they are placed. The common belt has leathern straps, and buckles to fasten it, an iron ring and a pocket. A double cincture for wrestling forms a very strong girth, which is put on by pupils who are very strong, when they wrestle. These belts may be made of different sizes, for youths of different ages: of five or six inches for tall youths and men, and of eight or ten inches for wrestlers. Their length is in proportion to the size of the person who uses them. These belts are very useful in strengthening the abdominal region in running and leaping. Riders, also, should furnish themselves with belts before getting on horseback, to prevent too violent motion of the viscera of the abdomen, and the disorders which may result from it. The use, indeed, of belts will by degrees prove their utility, and they will probably be worn even externally, without reference to physical exercises. They deserve this the more, because they give an air of lightness and elegance to the shape, and develope the chest. The most useful thing in existence is dangerous, if improperly applied. In very young persons, the chest and abdomen have been compressed by fastening the belt too tight, or making it too wide; and disorders of digestion and respiration have consequently been caused by pushing in the false ribs. This is an imprudence that should be avoided. If the belt be too low, it may press too much on the lower part of the belly; if too high, it may disorder the chest. It must therefore be placed on the loins, so as to pass over the navel; and, as said before, it must not be too tight. Having given these ideas of the utility of belts, and the manner of using them, it remains only to explain the triple use of those adopted for exercises: 1st, they fulfil, by their size and other circumstances, all the conditions which render them useful; 2nd, a pocket serves to inclose the articles that may be wanted, according to the class of exercises performing; 3rd, an iron ring is intended to suspend, by means of hooks, any thing we wish to carry, so as to leave the hands at liberty. TRAINING.