Foods of this kind are called _vegetables_.
~9.~ There are other things, which, if we eat or drink them, will make us sick or otherwise do us harm.

These are called _poisons_.

Only such food as is pure and free from poisons is good or safe for us to use.
~10.

Narcotics and Stimulants.~--There are a number of substances known as narcotics and stimulants, which, from their effects upon the body, may be classed as poisons.

Tobacco, opium, alcohol, and chloral are included in this class.