Combine lime and lemon slices and water in large kettle. Bring to boil and boil
20 minutes, or until peels are tender.
Drain and measure liquid. Add enough water to make 3 quarts liquid, then combine
liquid, fruit and sugar in kettle. Bring to boil and cook rapidly until mixture
sheets off spoon or to 221 degrees F on a candy thermometer. Pour boiling hot into
hot sterilized jars and seal.