It may be interesting to many to be informed of the mode adopted by experienced trainers and gymnasts in building up the system of a man when preparing him for great feats of endurance and strength. In the first place, the system must be purified and the liver and all the organs brought into the healthiest of conditions, which is now generally effected by the free use of lemons and castor oil. Formerly calomel and the black draught were resorted to for this purpose; but as the former was sometimes inclined to remain in the system, lemons came into use as safer and more efficacious. When the system, then, is purified of every impurity, the building up and strengthening process begins. Early in the morning the subject arises, and after a slight ablution, during which he carefully scrapes what is called the fur from his tongue with a thin piece of whalebone that he between his teeth bent, and then draws over his tongue after the manner of a rake. By this means, and by gargling his mouth and throat with cold water he is in a condition to enjoy a cup of tea without milk or sugar and a single piece of dry toast. This disposed of, he takes a short walk of say a quarter of a mile, and returns to breakfast, when he sits down to a mutton chop and toast, etc., still taking tea without milk or sugar. After breakfast he takes a rest of about half an hour, and then starts forth on a walk of from four to ten miles. Returning about 10 o'clock, after perspiring freely, he is rubbed dry and permitted to rest on his bed until he becomes quite cool. Then comes the strong rock-salt bath and sponge, after which, and on being rubbed dry once more, his muscles and flesh are manipulated by the naked hands of the trainer for two hours. His next meal is composed of a heavy beefsteak, some calf's foot jelly, toast, and perhaps a bottle of Bass' ale. He drinks but little or no water, as this liquid has a tendency to fatten and render the muscles flabby when taken internally. An hour's sleep may now be indulged in with advantage, after which comes a regular course of exercise, embracing pulleys, bars, clubs, dumb-bells, sand and bean bags--the sand bags hanging from the ceiling, to be hit in the manner of a man, right and left, with a view to strengthening the hands and packing and hardening the muscles, and the bean bags to be thrown between him and the trainer, the one and the other catching them in turn, so as to train the eye and the hand to quickness. In these exercises every muscle is brought into play, and all the limbs made to perform every movement of which the body is capable, so that all the muscles are developed alike, and ready at any moment to do, with the utmost efficacy and precision, the work proper to them. After a good rest, and at about 5 o'clock P. M., there is a moderate sponge bath and lots of rubbing. Indeed, so important is this latter, that if one man is not able to accomplish it, more help is called in. Supper at