ll,
and do not become as useful and successful men as they might be.

~20.~ Students in the naval and military schools of this country are not
allowed to use tobacco on account of its bad effects upon the mind. In
France the use of tobacco is forbidden to all students in the public
schools.

~21. Tobacco Leads to Vice.~--Boys who use tobacco are more liable to
get into company with boys who have other bad habits, and so are apt to
become bad in many other ways. The use of tobacco often makes men want
strong drink, and thus leads to drunkenness. If you wish to grow up with
a steady hand, a strong heart, and a good character you will never touch
tobacco.

~22. Effects of Tea and Coffee on the Nerves.~--People who use strong
tea and coffee are often inclined to be nervous. This shows that strong
tea and coffee, like alcohol and tobacco, are very injurious to the
nerves.

~23. Opium, Chloral, etc.~--There are several drugs which are given by
physicians to relieve pain or to produce sleep. They are sometimes
helpful, but their use is very dangerous. Opium and chloral belong to
this class of medicines. The danger is that, after a person has used the
medicine a little while, he will continue to use it. If a person takes a
poisonous drug every time he has a little pain, he will soon form the
habit of using it, and may never break it off. There are many thousands
of people who use opium all the time, and they are very much injured by
it in mind and body. The mind becomes dull and stupid and the body weak
and feeble. No medicine of this sort should ever be taken unless
prescribed by a physician.

SUMMARY.

1. In order to be well and useful we must keep the brain and nerves
healthy.

2. To keep the brain healthy we need plenty of pure air to breathe;
proper exercise of the brain by study; sufficient exercise of the
muscles in play and work; plenty of good food to make pure blood; a
proper amount of rest and sleep.

3. There are several things we ought not to do. We should not read or
study too much. We should not allow ourselves to become excited or
angry. We should avoid learning bad habits.

4. Alcohol paralyzes the brain and nerves.

5. Alcohol deceives a person who takes it by making him feel strong when
he is weak; warm when he is cold; rich when he is poor; well when he is
sick.

6. Alcohol makes men wicked. Most men who commit crimes are men who use
liquor.

7. The effects of tobacco upon the brain and n