One and three-quarter ounces of Russian isinglass, three and three quarter pounds of loaf sugar, and three lemons. Cut the isinglass into small pieces, turn over it one quart of cold water, and let it stand half an hour, then pour off the water. Put the isinglass into a pitcher with the juice of two lemons, and one cut in slices. Put in the sugar and a dessertspoonful of rose water. Over all pour three pints of boiling water, cover it and let it stand an hour or so until the isinglass is dissolved. Strain through a jelly bag into moulds, and set it in a cool place.