Abstract
Compared with corn meal at 225 Cal. per 100 grams, the productive energy of some other feeds were: rice polish 216, rice bran 181, rye flour 133, and three lots of corn bran, 103, 132 and 63 calories per gram. The productive energy per unit of effective digestible nutrients and for metabolizable energy are reasonably close for all the feeds tested except rye flour, which had an appreciably lower value and in this respect resembled wheat bran and wheat gray shorts reported in previous work.