RT Journal T1 APplied electrocardiography JF American Journal of Diseases of Children JO American Journal of Diseases of Children YR 1929 FD December 1 VO 38 IS 6 SP 1348 OP 1348 DO 10.1001/archpedi.1929.01930120226021 UL http://dx.doi.org/10.1001/archpedi.1929.01930120226021 AB Electrocardiography is not merely a contribution to laboratory physiology; it is a valuable practical method of the diagnosis of heart disease. It ranks well in importance with the roentgen ray and the sphygmomanometer. The practitioner is inclined to look on the electrocardiograph as a mysterious machine which makes mysterious curves of only academic importance. As a matter of fact, the clinician can obtain much practical help from it in the diagnosis of circulatory diseases and rheumatism. He will, therefore, do well to familiarize himself with the indications for an electrocardiographic study, and to be able to correlate the information presented in the graphic records with his clinical observations.The criticism which can be made against most medical books cannot be made against this monograph, namely, too long a distance between the covers. The authors have written clear of all debatable rubbish. They give the reader a clear idea of the