Is the Chief Value of Milk for Feeding Poultry Due to the Presence of a New Vitamin?

Early in the history of vitamins the question whether or not vitamin B consisted of only a single nutritive factor was a matter of serious consideration among nutrition investigators. Mitchell1 in 1919 discussed the situation in respect to vitamin B and pointed out certain inconsistencies which indicated the possibility that this vitamin was composed of more than one factor. In the past few years the results of a large body of research, recently reviewed by Sherman2, have shown that vitamin B is a complex of at least two factors, one of which prevents polyneuritis or beri-beri and the other of which is perhaps more distinctly growth-promoting and prevents pellagra. Recently these factors have been designated vitamin B and vitamin G re-respectively. Other results (3, 4, 5) have been obtained which indicate a third factor in the vitamin B complex. Furthermore some recent research work conducted at this laboratory also indicates . . .