As regards rapid running, from one hundred feet to one hundred yards may be attempted at full speed, and when the constitution is good, the body not too fat, the muscular developments fine, and the lungs sound, a quarter of a mile a minute may be accomplished, and a mile in five minutes, which is seldom done even in very good running. Ten miles an hour, which is the average speed of the mail, may, however, be easily performed with judicious and proper training. LEAPING. In leaping, that with the run, is the most common and the most useful. The object of the run is to impart to the nerves of the body a certain quantity of motion which may carry it onwards after the propelling power has ceased to act when the body leaves the ground. The run need not exceed twelve or fifteen paces: in this the steps are small and rapid. When the body leaves the ground, the legs are drawn up, one foot generally a little more than the other; and a great thing to be avoided, is coming to the ground on the heels. When springing, the height of the leap must be calculated, the breath held, the body pressed forward, and the fall should be upon the toes and the ball of the foot, although in an extended leap this is impossible. Leaping must, like running, be practised gradually; in the high leap, a person may easily accomplish the height of his own body, and should practise with the bar, which may be made of two upright posts bored, through which ropes should be placed according to the height required for the leap: on these should be hung a string with weights attached to each end to keep it straight. Should the leaper touch it with his feet as he takes his leap, it will be thrown off the pegs, thus showing that he did not make a clean leap. The deep leap may be acquired from the top of a bank into a hollow, and is useful in leaping from the top of a house or wall in a moment of danger. It may be practised from a flight of steps, ascending a step at a time to increase the height, till the limbs can bear the shocks, to break which, the body must be kept in a bent position, so that its gravity has to pass through many angles. The leaper should always take advantage of any rivulet that has one bank higher than the other, to practise himself. In the long leap, a person ought to be able to clear with a run, three times the length of his body. [Illustration]