Put one ounce of isinglass into a clean stewpan with two ounces of sugar and half a pint of water; stir this on the fire till it boils, and set it by the side to continue boiling very gently for twenty minutes, adding occasionally a very little cold water to facilitate the throwing up impurities in the form of scum; this must be removed, and the jelly strained through a napkin into a basin; add a little white-wine, or the juice of an orange, and pour the jelly into glasses, and set them in ice, or in a cold place, until the jelly has become firm; and then it will be an agreeable offering to the sick patient needing delicate food.