When hot, serve at once. Never allow the liquid to stand on the
grounds for any length of time, for the longer it stands the more tannic
acid will be drawn out.
33. As coffee made by boiling is usually somewhat cloudy, it may be
cleared in one way or another. The last cold water is added for this
purpose, for as it is heavier than the warm liquid it sinks to the
bottom and carries the grounds with it. Coffee may also be cleared by
stirring a small quantity of beaten raw egg, either the white or the
yolk, or both, into the grounds before the cold water is added to them.
One egg will clear two or three potfuls of coffee if care is exercised
in its use. What remains of the egg after the first potful has been
cleared should be placed in a small dish and set away for future use. A
little cold water poured over it will assist in preserving it. If the
egg shells are washed before the egg is broken, they may be crushed and
added to the grounds also, for they will help to clear the coffee. The
explanation of the use of egg for this purpose is that it coagulates as
the coffee heats and carries the particles of coffee down with it as
it sinks.
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