Probably the most successful method consists in bringing a certain
proportion of sugar and water to the boiling point, dropping the fruit
into the sirup thus formed, and cooking it for a definite length of
time. Boiling fruits in heavy sirup has a tendency to make them firm and
solid, rather than to cook them to pieces, as would be the case with
water or a thin sirup. Even very soft berries, when used for preserves,
will retain almost their original size and shape if they are properly
cooked. Except for the fact that a heavier sirup is used, the process of
preserving fruit is exactly like that of canning fruit by the
open-kettle method. The chief precaution to take in this method is that
as little water as possible be used, so that the sirup may be very thick
when the fruit is added.
Another method that may be recommended because it helps to keep the
fruit in good condition consists in cooking it in its own juice. In this
method, equal quantities of fruit and sugar are put together and allowed
to stand until enough juice is formed, preferably overnight, so that the
fruit may be cooked without the addition of any water.
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