Dr. James Mackenzie is well-known as a writer on disease of the heart and allied subjects; especially is he an authority on the physiologic disturbances of this organ, and naturally a large part of his book is devoted to an interpretation of its physiologic action and its perversions.
Thoughtful and judicious comments and records of the author's observations and experiments are found throughout the work, which is full of originality, and, unlike many treatises, is not a mere compilation. Everything is briefly stated, there are few repetitions, and the clear, simple English makes agreeable reading. The book is copiously illustrated, chiefly with radial, carotid, jugular and apex tracings, but also with diagrams and sketches.
Dr. Mackenzie distinguishes Nothnagel's vasomotor angina pectoris from the more common form, which in his opinion is not due to hypertension, as his own measurements of arterial tension during attacks do not prove its existence. He