212° Fahr. Water does not become hotter after it has begun to boil,
however long or with whatever violence the boiling is continued. This
fact is of great importance in cookery, and attention to it will save
much fuel. Water made to boil in a gentle way by the application of a
moderate heat is just as hot as when it is made to boil on a strong fire
with the greatest possible violence. When once water has been brought to
the boiling point, the fire may be considerably reduced, as a very
gentle heat will suffice to keep the water at its highest temperature.