those which have a bad taste are usually harmful.

17. Pepper, mustard, etc., as well as alcohol and tobacco, have an
unpleasant taste, and are not healthful. If we use them we shall injure
the nerves of taste as well as other parts of the body.

18. We feel objects by means of the sense of touch.

19. The sense of touch is most acute at the tip of the tongue and the
ends of the fingers.




CHAPTER XXVI.

ALCOHOL.


~1.~ As we learned in the early part of our study of this subject,
alcohol is produced by _fermentation_. It is afterwards separated from
water and other substances by _distillation_. We will now learn a few
more things about alcohol.

~2. Alcohol Burns.~--If alcohol is placed in a lamp, it will burn much
like kerosene oil. Indeed, it does not need a lamp to help it burn as
does oil. If a few drops of alcohol are placed upon a plate, it may be
lighted with a match, and will burn with a pale blue flame. Thus you see
that alcohol is a sort of burning fluid.