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This eBook from the Gutenberg Project consists of approximately 74 pages of information about Object Lessons on the Human Body.

Why do you say it is absorbent?—­“Because it will soak up liquids.”

How many skins have you?—­“Two; an outside skin, and an inner skin.”

Which is the true skin?—­“The inner skin.”

Of what is the inner skin composed?—­“Of blood-vessels and nerves.”

How do you know that the outer skin has no blood-vessels?—­“Because if I put a pin through the outer skin the blood does not flow out, as it would if I had cut a blood-vessel.”

How do you know the outer skin has no nerves?—­“Because if I put a pin through my outer skin it does not make 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.

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[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.

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