ir to my
tongue; the eleventh pair to my neck; the tenth pair to my neck, throat,
lungs, stomach, and different parts of my body.

* * * * *

QUESTIONS ON THE FORMULA.

1. Describe the brain.

2. Where is the brain placed?

3. Describe the outer membrane of the brain.

4. Describe the middle membrane of the brain.

5. Describe the inner membrane of the brain.

6. Tell about the nerves.

7. Tell about the use of the two kinds of nerves.

8. Tell about the nerves which pass from the brain.

9. Tell about the spinal cord.

10. Tell about the nerves which pass from the spinal cord.

11. What happens if a nerve be destroyed?

12. What happens if a nerve be pressed upon too long?

13. What happens if you drink alcoholic liquors, or snuff, smoke, or chew
tobacco?

14. What is necessary if you would have a healthy brain?

* * * * *

THE BRAIN AND ITS WORK.

The brain is egg-shaped, and of two parts, the large brain (_cerebrum_),
and the little brain (_cerebellum_). These are composed of a white and gray
substance, which in the large brain is so folded and wrinkled that it looks
like the meat of an English walnut; in the little brain it is so arranged
that it resembles a tree, and is called _arbor vitae_, tree of life. The
mind does its thinking through the large brain, and controls its muscles
through the little brain.

A drunken man can not walk straight because alcohol has hurt the little
brain; he can not think straight because it has poisoned the large brain.

* * * * *

[Illustration: THE BRAIN AND THE SPINAL CORD.]

C, the large brain (_cerebrum_). B, the small brain (_cerebellum_). S, a
portion of the spinal cord.

* * * * *

QUESTIONS ON THE NERVOUS SYSTEM.

Where is your brain?--"In my skull."

What color is the brain?--"Gray and white."

What does the brain resemble?--"Marrow."

How is the brain protected?--"By three coats or membranes."

What may you name these membranes?--"The outer membrane, the middle
membrane, and the inner membrane."

Describe the outer membrane. See Formula.

Describe the middle membrane. See Formula.

What are the nerves?--"White ashen-gray pulpy cords, which are found in the
brain."

Where do they go from the brain?--"To every part of the body."

How many kinds of nerves have you?--"Two."

What names are given to the two ki