The Anti-Rachitic Value of Salmon Oil

In a previous experiment reported by the writers 2 in 1926, a commercial oil, extracted from cannery refuse consisting of heads, tails, fins and viscera (including the livers) of salmon, was found to compare favorably with cod liver oil and greens as a source of vitamin A for poultry. That experiment was followed by the one 3 reported in this paper to determine if the salmon oil also contained vitamin D. For this experiment, fifty chicks, three days old, were divided into two groups of twenty-five each, and placed in a brooder-house which was divided, by a wire partition, into two pens. Light was admitted through large glass windows in the front of the house. The feed supplied during the first week was a scratch grain mixture, consisting of equal parts of wheat, granulated yellow corn, and steel cut oats, which was fed three times daily. The feeding of scratch grain was . . .