The author states in his preface that this book was not intended to be a mere laboratory guide, nor a purely clinical treatise, but a description of the borderland between the laboratory and the clinic. This purpose, on the whole, has been accomplished satisfactorily. The book has many advantages. It is brief. It is written by a physician who has had much more training in chemical examinations than practitioners on the average receive. The author has taken especial pains to interpret urinary findings clinically, so far as it is possible to do so at present, and this last is the feature of the book which will make it most attractive, we think, to the practitioner. The chapters dealing with albuminuria, the purin bases, glycosuria, acetonuria, the conjugate sulphates and glycuronates are modern and interesting. The inorganic constituents of the urine receive an unusual degree of attention, but deservedly so in