This collection of papers is concerned with the vitamins of the B complex, including biotin and choline, vitamin K and the economy of phosphorus in the animal organism. The introductory chapter, presented by C. A. Elvehjem, reviews the growth of knowledge of the action of the vitamins with special reference to their relation to enzyme systems and to bacterial growth. This phase is covered in more detail in the specific chapters on the various vitamins. Methods and results of animal experimentation are given, and wherever possible the relationship to human nutrition is shown. The discussions are exceedingly stimulating from the point of view both of how knowledge of these vitamins and of the phosphorus economy has grown and of how much remains to be found out.
Contributors are C. A. Elvehjem, S. Ochoa, Norman Jolliffe, Paul György, W. H. Sebrell, David T. Smith, S. Lepkovsky, Roger J. Williams, Edgar S.