Tobacco and alcohol are absolutely prohibited, the kind of food eaten and the hours for retiring are compulsory, and a boy is taught not only to train his muscles but to discipline his mind. Before a candidate is allowed to take active part in the sport for which he is training he must be “in condition,” as it is called. There are a great many rules of health that will help any one to keep well, but the best rule of all is to live a common-sense life and not to think too much about ourselves. Systematic exercises taken daily with setting up motions are very good unless we allow them to become irksome. All indoor exercise should be practised with as much fresh air in the room as possible. It is an excellent plan to face an open window if we practise morning and evening gymnastics. There are many exercises that can be performed with no apparatus whatever. In all exercises we should practise deep regular breathing until it becomes a habit with us. Most people acquire a faulty habit of breathing and only use a small part of their total lung capacity. Learn to take deep breaths while in the fresh air. After a while it will become a habit. Just how much muscle a boy should have will depend upon his physical make-up. The gymnasium director in one of our largest colleges, who has spent his whole life in exercise, is a small, slender man whose muscles are not at all prominent and yet they are like steel wires. He has made a life-long study of himself and has developed every muscle in his body. From his appearance he would not be considered a strong man and yet some of the younger athletes weighing fifty pounds more than he, have, in wrestling and feats of strength, found that the man with the largest muscles is not always the best man. There is one question that every growing boy will have to look squarely in the face and to decide for himself. It is the question of smoking. There is absolutely no question but that smoking is injurious for any one, and in the case of boys who are not yet fully grown positively dangerous. Ask any cigarette smoker you know and he will tell you _not to smoke_. If you ask him why he does not take his own advice he will possibly explain how the habit has fastened its grip on him, just as the slimy tentacles of some devil fish will wind themselves about a victim struggling in the water, until he is no longer able to escape. A boy may begin to smoke in a spirit of fun or possibly because he thinks it is manly, but more often it is because the “other fellers” are trying it too.