Frozen Cranberries

Pick over and wash cranberries, add water and sugar, and cook ten minutes, skimming during the cooking. Rub through a sieve, cool, and pour into one-pound baking-powder boxes. Pack in salt and ice, using equal parts, and let stand four hours. If there is not sufficient mixture to fill two boxes, add water to make up the desired quantity. Serve as a substitute for cranberry sauce or jelly.