me suffer pain, as it would if I had
touched a nerve."

What gives color to the skin?--"A jelly-like substance between the inner
and the outer skin."

What have you learned about the true skin?--"That it is of the same color
in people of every nation."

What difference is there in the thickness of the outer skin? [See Formula.]

What passes through the pores of the skin? [See Formula.]

What is this waste called when it comes from the surface of the
skin?--"Perspiration."

When does the perspiration flow through the pores of the skin?--"All the
time, if the skin is healthy."

Why do we not always see the perspiration which passes through the
pores?--"Because it does not always form drops on the surface of the skin;
it generally passes off in very fine particles."

What becomes of the fine or minute portions of perspiration which pass from
the body?--"Some of these portions are absorbed by the clothing; some pass
into and mix with the air around us."

What effect does the perspiration produce on the air and the clothing?--"It
soon makes the air unfit to be breathed, and the clothing unfit to be
worn."

What is necessary if you would have a healthy skin? [See Formula.]

Why must you wear clean clothing?--"That there may be nothing impure in the
clothing for the pores of the skin to absorb."

Why should you breathe pure air?--"Because air purifies the blood, and pure
blood is necessary to make a healthy skin."

How does drinking alcoholic liquors hurt the skin?--"It makes the blood
impure, and impure blood makes unhealthy skin."

In what other way does drinking these liquors hurt the skin?--"It gives the
skin too much work to do."

How does it give it too much work to do?--"It makes more waste substance to
pass from it through the pores, in the form of perspiration."

In what other way does drinking alcoholic liquors hurt the skin?--"It makes
it a bad color."

How does it make the skin a bad color?--"It stretches the little
blood-vessels of the skin, and makes them too full of blood." See Appendix.

* * * * *

[Illustration: THE HEART.]

A, the right ventricle; B, the left ventricle; C, the right auricle D, the
left auricle; E, the aorta; F, the pulmonary artery.

* * * * *

PART VIII.

FORMULA FOR THE LESSON ON THE HEART AND THE CIRCULATION OF THE BLOOD.

1. My heart is shaped like a cone, and placed in my chest near my
breastbone