up in the basin the liquid in the bottle will be at about
the same height as the water in the basin. Now place in the neck of the
bottle a closely fitting cork in which there has been inserted a piece
of the stem of a clay pipe or a small glass tube. Place the bottle in
the basin. Watch carefully until the liquid in the bottle begins to
boil. Now apply a lighted match to the end of the pipe-stem or glass
tube. Perhaps you will observe nothing at first, but continue placing
the match to the pipe-stem, and pretty soon you will notice a little
blue flame burning at the end of the stem. It will go out often, but you
can light it again. This is proof that alcohol is escaping from the
liquid in the bottle. After the liquid has been boiling for some time,
the flame goes out, and cannot be re-lighted, because the alcohol has
been all driven off.

[Illustration: Alcohol experiment.]

~7. The Alcohol Breath.~--You have doubtless heard that a person who is
under the influence of liquor may be known by his breath. His breath
smells of alcohol. This is because his lungs are trying to remove the
alcohol from his blood as fast as possible, so as to prevent injury to
the blood corpuscles and the tissues of the body. It is the vapor of
alcohol mixed with his breath that causes the odor.

~8.~ You may have heard that sometimes men take such quantities of
liquor that the breath becomes strong with the vapor of alcohol and
takes fire when a light is brought near the mouth. These stories are
probably not true, although it sometimes happens that persons become
diseased in such a way that the breath will take fire if it comes in
contact with a light. Alcohol may be a cause of this kind of disease.

~9. Making Alcohol.~--It may be that some of our young readers would
like to find out for themselves that alcohol is really made by
fermentation. This may be done by an easy experiment. You know that
yeast will cause bread to "rise" or ferment. As we have elsewhere
learned, a little alcohol is formed in the fermentation of bread, but is
driven off by the heat of the oven in baking, so that we do not take any
of it into our stomachs when we eat the bread. If we place a little
baker's yeast in sweetened water, it will cause it to ferment and
produce alcohol. To make alcohol, all we have to do is to place a little
yeast and some sweetened water in a bottle and put it away in a warm
place for a few hours until it has had time to ferment. You will kn