This volume presents an original concept in the study of cardiovascular disease. For example, a series of electrocardiograms is reproduced and each case is discussed briefly. The net result is fortunate, as it has been possible to limit the presentations to items of importance in reaching an accurate diagnosis, thus materially increasing the utility of the text. In tables 1 and 2 the normal variations of the ST segments and T waves are set forth for the three standard leads as well as for leads aVR, aVL, aVF, and V2. In that table the ST displacements are presented for all of the commonly recorded leads. This is the general procedure throughout the book. The book is an addition of some value to the growing literature of cardiovascular disease and its precise recognition. It can be recommended to those interested in the correct diagnosis of cardiovascular disease or suspected cardiovascular disease.