Tea and Coffee.~--Many people drink tea or coffee at their meals, and some persons think that these drinks are useful foods; but they really have little or no value as foods.

Both tea and coffee contain a poison which, when separated in a pure form, is so deadly that a very small quantity is enough to kill a cat or a dog.

This poison often does much harm to those who drink tea or coffee very strong for any great length of time.
[Illustration: A DROP OF IMPURE WATER MAGNIFIED.] ~8.

Alcohol~ (al'-co-hol) .-- All of you know something about alcohol.
Perhaps you have seen it burn in a lamp.

It will burn without a lamp, if we light it.