The Vitamins.

This is a comprehensive treatise on the vitamin, summarizing information on the chemical nature of the individual vitamins, their rôles in life processes, their formation and distribution in nature, their relative abundance in different types of foods and stability under various conditions. The more important knowledge concerning each vitamin is segregated in separate chapters including the chronological development of information regarding them, their physiologic properties, their relation to nutrition and health and their quantitative determinations. The physiologic, pathologic, nutritional and health aspects of the subject are treated with the interests of all probable readers in view. The bibliography is brought to the middle of 1930 and includes practically all the important literature. For convenience of reference in future editions, tabulation of definitions explaining the recognized units of the respective vitamins and the relative potencies of common foods might well be appended. The authors have contributed a monumental work in the