To come to the third agent of health enumerated some pages back, Sleep. As a rule, it is not a difficult matter to see that members of a football team take the requisite amount of sleep. There are occasions, as in college, when some society event of unusual importance tempts the men to sit up late, but with such exceptions as these there is no great difficulty experienced in making the majority of the men keep good hours. And this is growing more and more simple as athletics become more general, for they take the place of much of the dissipation which was formerly the only outlet for the superabundant animal spirits of young men. In the case, however, of the occasional candidate for the team who comes under the captain's eye as inclined to late hours, there must be the strictest kind of discipline shown. Such a man is the very one whose stamina will be affected after a while by lack of sleep, and that too at a time when the rest of the men are nearing the perfection of condition. Thus he will be found falling off at the very time when it is a most serious matter very likely to fill his position with a new man. Eight or nine hours sleep should be insisted upon, and that sleep should be taken with regularity. In fact, not only the sleep, but the meals and the exercise, should all be made as nearly regular, regarding hours, as possible. Men should have separate rooms, and particularly when off upon trips they should not sleep together. Plenty of fresh air should be admitted to the sleeping-room, but draughts are to be avoided. This is not because every time the air blows upon a man he is liable to contract a severe cold, for the chances are against this, but because there are times when he is particularly prone to such an accident, and if he is in the habit of sleeping without regard to draughts it is not likely that he will take precautions then. If a man has, for instance, played an especially stiff game and upon a muggy and exhausting day, he will undoubtedly turn in thoroughly tired out, and perhaps still somewhat heated. Now if he, when in that state, sleeps in a draught, he will probably find himself very lame in the morning, even though he escape other more serious consequences. Just one more word of caution regarding sleep, and that is in the matter of obtaining a good night's rest just before the important match of the season. To insure this is to do much towards securing the best work of which the men are capable from the team upon the following day. [Illustration: W. HEFFELFINGER. Yale.]