"
Why should you not rush suddenly from a warm to a cool place?--"Because
when warm the pores of the skin are open; if I rush suddenly into the cool
air, these pores are closed too quickly."
Why does stopping the perspiration hurt the lungs more or less?--"The
impurities it ought to carry away remain in the body, make the blood
impure, and produce disease in some part; very often that part is the
lungs."
What harm does alcohol do in the lungs?--"It fills the lungs with impure
blood."
What harm does it do to the air-cells?--"It hardens the walls of the
air-cells of the lungs."
What harm is done by the hardening of these air-cells?--"1. The lungs
cannot take in enough of the gas called oxygen to purify the blood
perfectly. 2. The gases or vapors in the lungs cannot pass freely through
the hardened air-cells."
What happens from this?--"The lungs become diseased."
From what disease do some hard drinkers suffer?--"Alcoholic consumption,
for which there is no cure." See Appendices on Alcohol and Tobacco.
* * * * *
[Illustration: THE DIGESTIVE ORGANS.]
1. The upper jaw.
2. The lower jaw.
3. The tongue.
4. The roof of the mouth.
5. The food-pipe.
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