When peaches are in season, have in a convenient place an old
basket or something of the sort, in which all the peach stones can
be saved; they are too useful to be thrown away. Then have them
carefully cracked, so as to extract the kernels whole if possible.
Spread them out on a dish for one day. Then, put them into a box
or jar, and keep them to use as bitter almonds; for which they are
an excellent substitute in flavouring custards, creams and cakes.
Plum stones are worth saving in the same manner.