The grain is next dried and ground, and is then boiled with water.

The water dissolves the sugar.

The sweet liquid thus obtained is separated from the grain, and yeast is added to it.
This causes it to ferment, which changes the sugar to alcohol.

Thus we see that the grain does not contain alcohol in the first place, but that it is produced by fermentation.
~12.~ All fermented liquids contain more or less alcohol, mixed with water and a good many other things.

Rum, brandy, gin, whiskey, and pure alcohol are made by separating the alcohol from the other substances.
This is done by means of a still, and is called _distillation_.
[Illustration: DISTILLATION.] ~13.~ You can learn how a still separates the alcohol by a little experiment.