Apple Jelly 2

Select apples that are rather tart and highly flavored; slice them without paring; place in a porcelain preserving kettle, cover with water, and let them cook slowly until the apples look red. Pour into a colander, drain off the juice, and let this run through a jelly-bag; return to the kettle, which must be carefully washed, and boil half an hour; measure it and allow to every pint of juice a pound of sugar and half the juice of a lemon; boil quickly for ten minutes. The juice of apples boiled in shallow vessels, without a particle of sugar, makes the most sparkling, delicious jelly imaginable. Red apples will give jelly the color and clearness of claret, while that from light fruit is like amber. Take the cider just as it is made, not allowing it to ferment at all, and, if possible; boil it in a pan, flat, very large and shallow.