he does not know that
he is tired and ought to rest.

~13.~ When you grow up to be men and women you will want to have strong
muscles. So you must be careful not to give alcohol a chance to injure
them. If you never taste it in any form you will be sure to suffer no
harm from it.

~14. Effects of Tobacco on the Muscles.~--Boys who smoke cigars or
cigarettes, or who chew tobacco, are not likely to grow up to be strong
and healthy men. They do not have plump and rosy cheeks and strong
muscles like other boys.

~15.~ The evil effect of tobacco upon boys is now so well known that in
many countries and in some states of this country laws have been made
which do not allow alcohol or tobacco to be sold or given to boys. In
Switzerland, if a boy is found smoking upon the streets, he is arrested
just as though he had been caught stealing. And is not this really what
a boy does when he smokes? He robs his constitution of its vigor, and
allows tobacco to steal away from him the strength he will need when he
becomes a man.

~16. Tea and Coffee.~--Strong tea and coffee, while by no means so bad
as alcohol and tobacco, may make us weak and sick. A person who drinks
strong tea or coffee feels less tired while at work than if he had not
taken it, but he is more tired afterwards. So you see that tea and
coffee are also whips, small whips we might call them, and yet they
really act in the same way as do other narcotics and stimulants. They
make a person feel stronger than he really is, and thus he is led to use
more strength than he can afford to do.

SUMMARY.

1. We must use the muscles to make them grow large and strong.

2. Exercise should be taken regularly.

3. Exercise makes the muscles strong, the body beautiful, the lungs
active, the heart vigorous, and the whole body healthy.

4. Things we ought not to do: To run or play hard just before or after
eating; to strain our muscles by lifting too heavy weights; to exercise
so violently as to get out of breath; to lie, sit, stand, or walk in a
cramped position, or awkward manner; to wear the clothing so tight as to
press hard upon the muscles.

5. Good food is necessary to make the muscles strong and healthy.

6. Alcohol makes the muscles weak, although at first it makes us feel
stronger.

7. A boy who uses tobacco will not grow as strong and well as one who
does not.

8. The use of strong tea and coffee may injure the muscles.

CHAPTER XXII.

HOW WE FEEL