To Extract the Juice of Plums for Jelly

Take the stalks from the fruit, and throw aside all that is not perfectly sound: put it into very clean, large stone jars, and give part of the harder kinds, such as bullaces and damson, a gash with a knife as they are thrown in; do this especially in filling the upper part of the jars. Tie one or two folds of thick paper over them, and set them for the night into an oven from which the bread has been drawn four or five hours; or cover them with bladder, instead of paper, place them in pans, or in a copper* with water which will reach to quite two-thirds of their height, and boil them gently from two to three hours, or until the fruit is quite soft, and has yielded all the juice it will afford: this last is the safer and better mode for jellies of delicate colour.