26. The methods employed for the canning of foods include the
_open-kettle method_, the _cold-pack method_, the _steam-pressure
method_, and the _oven method_. Of these, the open-kettle method is
perhaps the oldest household method of canning, and it is still used by
many housewives. The other methods, which are newer, seem troublesome to
the housewife who is familiar with the open-kettle method, yet it will
only be fair to give the new methods a trial before deciding which to
use. The one-period cold-pack method has much to recommend it. Foods
canned in this way undergo less change in form and flavor than those
canned by the open-kettle method; besides, there is less danger of
spoiling. In fact, many foods, such as vegetables and meats, that cannot
be canned satisfactorily by the open-kettle method will keep perfectly
if they are carefully preserved by the one-period cold-pack method. The
steam-pressure method requires the use of special equipment, as is
explained later. While it is a very acceptable canning method, it is not
accessible in many homes. The oven method is liked by many housewives,
but it offers almost the same chance for contamination as does the
open-kettle method.