Few books have been written in recent years on disease of the heart in which considerable space has not been devoted to the newer methods in cardiac diagnosis. Not infrequently there has been a tendency to overestimate the value of the instruments of precision. This book by Crummer, with introduction by Libman, is an exception to the general tendency in that the mechanical aids employed in cardiac diagnosis are considered in a short chapter of fifteen pages.
Emphasis is placed on the value of the simple methods of physical examination and careful clinical observations and at this time this fully justifies a work of this type. The book is apparently not intended to make an extensive survey of the entire field. A creditable balance is, however, maintained and several suggestions are made which should stimulate further careful clinical observation. The book is easily read. It will be a helpful guide