Some Experiments on the Physiology of Vitamin A Storage in the Chick

The Application of Deutectomy for Reducing Initial Vitamin A Reserves in Newly Hatched Chicks, and Some Observations on the Apparent Consumption of These Reserves

“…per pound of feed, liver vitamin A of normal birds at 7 days was 89 percent of that at hatching, and at 14 days it was 31 percent of that at 7 days. These findings are in agreement with those of Rubin and Bird (1941) and Bolin et al (1943).…”

The Comparative Utilization of Carotene and Pre-Formed Vitamin A in Broiler Type Chicks

“…Earlier studies by Johnson et al (1948) and by Rubin and Bird (1941) had resulted in an opposite view point. Both of these authors reported a higher level of vitamin A activity in the livers of birds fed carotene than that shown by chicks receiving fish liver oil.…”

The Effect of Dietary Vitamin A, Ambient Temperature and Rearing Location on Growth, Feed Conversion and Vitamin Liver Storage of White Leghorn Pullets

“…Rubin and Bird (1941) indicated that the liver was weeks. However, only the 9 or 10, and 20 week weights are reported.…”