This section is from the book "The National Cook Book", by A Lady Of Philadelphia. Also available from Amazon: I Know How to Cook.
Dissolve one ounce of Russian isinglass in three half-pints of warm water. Strain it through your flannel jelly-bag. Add to this three pints of cranberry juice with four pounds of sugar; boil and skim it. As soon as the scum has ceased to rise strain it and put it in moulds. The sugar should be of the best quality.
Squeeze the juice from the oranges, and to every pint of the juice add a pound of sugar and a quarter of an ounce of dissolved isinglass. The Russian isinglass is the kind to use for this purpose. Boil and skim it till a jelly is formed, which you may tell by letting a drop fall in a glass of cold water, and if it falls to the bottom in a mass the jelly is done. Or, take a little out in a spoon and expose it to the cool air for a few minutes.
Stem the strawberries, put them in a pan, and with a wooden spoon or potato masher rub them fine. Put a sieve over a pan, and inside of the sieve spread a piece of thin muslin; strain the juice through this, and to a pint add one pound of sugar, with a quarter of an ounce of isinglass dissolved in water to every five pounds of sugar. When the sugar is dissolved set the kettle over the fire and boil it till it is to a jelly. Pour it into glasses while it is warm, and paste them when cold.
Mash your fruit with a wooden spoon, and squeeze the juice through your jelly bag. To every pint of juice allow a pound of white sugar. When the sugar is dissolved, add a piece of isinglass dissolved in warm water to clarify the jelly. A quarter of an ounce of isinglass to five pints of juice will be sufficient. Boil and skim it till a jelly is formed; then take it off the fire and put it in glasses while warm. The next day put brandy paper over them and paste them.
Black currant jelly is made in the same way, only it requires but three-quarters of a pound of sugar to a pint of juice.
Pare and core your quinces, and as you pare them throw them into cold water. Put them into a preserving kettle with water enough to cover them, and let them boil till the fruit is tender. Then put a sieve over a pan, pour the fruit and water into it and let it drain, but do not mash the fruit; strain the juice through the jelly bag. To each pint of juice thus obtained add one pound of loaf or pulverized white sugar; and to every five pounds of sugar add a quarter of an ounce of isinglass dissolved in hot water. When the sugar is dissolved put it over the fire and boil and skim it till a jelly is formed, which you can discover by dropping a little in a glass of cold water; if it sinks to the bottom without mingling with the water the jelly is done. Pour it in your glasses when it is lukewarm, and let them stand open till it is entirely cold. Cover with brandy paper, and paste paper over the top.
If you wish to have light colored jelly, never put in the parings, as they always make it dark. A jelly may be made of the parings and cores for family use.
Apple jelly may be made in the same manner as the quince. The pulp of the apple, which is left after the jelly is made, may be sweetened for pies. The pulp of the quince may be made into marmalade according to the following receipt:
 
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