Put carrots and seeded lemons and oranges (including rind) through a food grinder (coarse). Save all juices. Add sugar. Cook slowly until thick. Pour hot into hot sterilized pint jars, adjust lids, and process in hot water bath canner for 20 minutes after water comes to rolling boil, or for 10 minutes at 10 pounds of pressure in pressure cooker. Makes 3 pints.