The introduction of a textbook on methods and chemistry of the vitamins should be welcomed by all workers in the field. While a book of this character will need frequent revision to meet current advances, it fills a much needed place. Too often the worker in the field of vitamin research must go through a vast amount of current literature in order to get useful data on technic. This monograph is a collection of all current methods on vitamin research. It is exceedingly well organized and edited. The text is replete with valuable protocols, illustrations and graphs, which add considerably to the text. It will be particularly valuable to the novice, as the author has included not only advanced material but such fundamental subjects as selection and care of laboratory animals, their spontaneous diseases, and the feeding of animals used for vitamin research. The author's selection of methods is excellent.