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(From the Research Laboratories, The E. L. Patch Company, Boston.)
Samples of cod liver meals were obtained on the open market. These were added to a typical poultry ration. Pens of twenty Rhode Island Red baby chicks were used for the test. Control pens received cod liver oil incorporated in the basal ration. The experimental period was of eight weeks duration and test birds were removed from each pen at the end of the third, fifth, and eighth week. These were killed, and the tibiae removed and examined to determine the extent of calcification. It was found that the best cod liver meals produced about the same results when 2 per cent was added to the basal ration as when one-half of one per cent of cod liver oil was added. The poorer meals were found to possess little if any vitamin value.