bones are easily bent out
of shape; if I do not sit and stand erect, they will grow crooked."

Why is it wrong to wear tight clothing?--"Because tight clothing crowds the
bones out of shape."

Whose bones are the more brittle, those of a child, or those of an old
person?--"Those of an old person."

What do you mean by _brittle_?--"Easily broken."

Whose are the more flexible?--"Those of a child."

What do you mean by _flexible_?--"Easily bent."

What repairs the worn out bones, flesh, and skin of the body?--"The blood."

What do you mean by _repairs_?--"Mends."

What causes the bones, flesh, and skin of your body to change often?--"The
bones, flesh, and skin are always wearing out, and the blood is always
building and repairing them again."

What are alcoholic liquors?--"Liquors which have alcohol in them."

Name some alcoholic liquors.--"Beer, wine, rum, etc."

Whose bones mend the more easily when broken, the bones of those who drink
alcoholic liquors, or those of the people who do not use these
poisons?--"The bones of those who _do not_ use alcoholic liquors."

What other poison hurts the bones?--"Tobacco."

How do alcohol and tobacco hurt the bones?--"They make bad blood, and bad
blood makes poor bones."

* * * * *

[Illustration: FRONT VIEW OF THE MUSCLES OF THE BODY.]

* * * * *

PART VI.

FORMULA FOR THE LESSON ON THE MUSCLES.

1. Muscles are the red, elastic bands and bundles of thread like substance,
called flesh, which cover the bones and make the eyeballs, the eyelids, the
tongue, the heart, the lungs, and various other parts of the body.

2. There are about four hundred and fifty muscles in my body.

3. The work of the muscles is to support and move my bones, and different
parts of the body.

4. The muscles may be named the muscles of my head, the muscles of my
trunk, the muscles of my limbs.

5. The muscles of my head cover and move the parts of my head and face. The
muscles of my trunk cover and move the parts of my neck and trunk. The
muscles of my limbs cover and mote the parts of my arms and legs.

6. Those muscles are the weakest which I use least; those muscles are the
strongest which I exercise most in work or play.

7. If I would be strong and healthy,
my muscles must be used,
my muscles must be rested,
my muscles must be supplied with good blood.

I must exercise in work and play to make them