It is Very Difficult to Break the Habit of Smoking. As a matter of practical experience, not one smoker in fifty who tries to swear off ever succeeds in doing so permanently. Why then should any one form a habit, which is of no benefit whatever, which is expensive, unpleasant to others, and which may become exceedingly injurious, simply for the sake of saddling one's self with a craving which will probably never be got rid of all the rest of one's life? The strongest and most positive thing that a smoker can say about his pipe, or cigar, or cigarette, is that he could not get along without it; and he will usually add that he wishes he had never begun to use it. You are better off in every way by letting tobacco strictly alone, and never teaching yourself to like it. Tobacco is Not a Natural Taste. As might be expected, in the case of such an utterly useless drug, we have no natural liking or instinct for it; and the taste for it has to be acquired just as in the case of alcohol, only as a rule with greater difficulty and with more painful experiences of headache, nausea, and other discomforts. [Illustration: A BOARD OF HEALTH EXAMINATION FOR WORKING PAPERS The Board of Health of the City of New York requires that all children between the ages of fourteen and sixteen shall have certificates of good health before they can be employed in business. Any employer who hires a child without such a certificate is liable to a heavy fine. This law is to protect the health of both the worker and the public.] Nicotine, a Powerful Poison. Tobacco contains and depends largely for its effects upon considerable amounts of a substance called _nicotine_. This is a powerful poison, even in very small doses, with only feeble narcotic, or pain-deadening, powers; but fortunately, the larger part of it is destroyed in the process of burning. Enough, however, is carried over in the smoke, or absorbed through the butt of the cigar or cigarette, or the mouth-piece of the pipe, to injure the nervous system, especially in youth. As will be seen in the chapter upon the "Care of the Heart," it especially attacks the nerves supplying the heart, and is thus most harmful to growing boys. On account of its injurious effects upon the nerves of the heart, smoking has long been forbidden by trainers and coachers to all athletes who are training for a contest or race. In addition to its poisonous effects upon the nervous system, tobacco also does great harm to boys and young men by providing them with an attractive means of filling up their time and keeping themselves amused without either bodily or mental effort. The boy who smokes habitually will find it much easier to waste his time in day-dreams and gossip, and tends to become a loafer and an idler.