By W. H. BLACK, senior animal husbandman, and R. L. HINER, assistant animal husbandman, Animal Husbandry Division, Bureau of Animal Industry; L. B. BTJRK, marketing specialist, Agricultural Marketing Service; LUCY M. ALEXANDER, associate specialist in foods, Foods and Nutrition Division, Bureau of Home Economics, United States Department of Agriculture, and C. V. WILSON, associate animal husban...