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The disturbances of cardiac mechanism are a bugaboo to many physicians, and at the sight of a complicated looking electrocardiogram they frankly throw up their hands in despair. This state of affairs is not unintelligible, since simple and lucid expositions of the subject are difficult to find. Sir Thomas Lewis' "Mechanism and Graphic Registration of the Heart Beat" still remains the great store-house of information, but neither it nor the other smaller treatise on clinical electrocardiography seems to be widely read in this country.
This little book by Boden—if the American reader is not scared off by a foreign language — is an admirable elementary exposition of electrocardiography" for the actual practitioner." Outstanding features are the exquisite tracings and diagrams, which really make the understanding of the usual terrors such as "flutter," "ventricular tachycardia" and "nodal rhythm" simple, even for the most timorous. The author holds to conventional views, which