Presence of Carotenase in the Liver of the Dog

Utilization of Intravenously Administered Carotene by Dairy Calves

“…The letter A was later prefixed with the term vitalll!n and the factor became known as vitamin A. After the extensive investigations 0£ Steen.bock (44) Though this theory was accepted for almost 1; years, the evidence presented during this time by various workers (1, 12,38,39,52) was eontlicting and u.nsatisfaetory in conf'il'Dlirig the liver as . .…”