4. The foods most liable to be adulterated in this way are milk, sugar,
and butter.

5. Tobacco, while not actually eaten, is thought by some persons to be a
food, but it is not. It is a poison, and injures all who use it.

6. Boys who use tobacco do not grow strong in body and mind.




CHAPTER VI.

OUR DRINKS.


~1.~ Water is really the only drink. It is the only substance which will
satisfy thirst. All other fluids which we drink consist mostly of water.
Thus, lemonade is lemon-juice and water. Milk is chiefly water. Wine,
beer, cider, and such liquids contain alcohol and many other things,
mixed with water.

~2. Why we Need Water.~--If we should wet a sponge and lay it away, it
would become dry in a few hours, as the water would pass off into the
air. Our bodies are losing water all the time, and we need to drink to
keep ourselves from drying up.

~3.~ Water is also very necessary for other purposes. It softens our
food so that we can chew and swallow it, and helps to carry it around in
the body after it has been digested, in a way about which we shall learn