Follis attempts to characterize the morphologic and physiologic changes incident on deficiency in the diet elements of compounds. In any survey of the field of nutritional deficiency, one is easily confused by the multitude of pathologic changes which have been ascribed to any specific deficit. Therefore, Follis has performed a welcome service in summarizing authoritatively the currently accepted descriptions of nutritional deficiency.
The book is a small one and devotes itself to single deficiencies as seen in mammals. The emphasis throughout is on morphologic changes. The author states that his physiologic data are intended merely as a brief survey and introduction to the subject. Follis organizes his subject into six parts. Four of these are devoted to the deficiencies respectively of the elements, amino acids, fatty acids and vitamins. The bulk of the material is concentrated in the chapter on vitamins. The remaining two chapters, while less encyclopedic, are notable