As is stated by the authors, this book is written to provide a helpful manual rather than a complete treatise. In this respect the book will be helpful to medical students, nutritionists and dietitians. The clinician, particularly, may learn much from Part I, which deals with the nature and functions of the vitamins. The clinician will, however, find many lacunas in Part II, which deals with the clinical aspects of the avitaminoses. Unfortunately, the clinical methods are not sufficiently up to date to provide the clinician with the most modern and readily applicable clinical procedures.