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Introduction of Air into the Veins
Boston Medical and Surgical Journal
vital action or a simple mechanical elasticity, may contribute in part to the production of the second sound. About the time lhat Mr. Turner's views were published, Dr. Barry published a Thesis containing a different hypothesis. He maintained that the sounds are produced, not by the contraction, but by the dilatation of the cavities. According lo his views, the first sound is occasioned by the diastole of the auricles, the second by that of the ventricles. Since lhat period an able discussiondoi:10.1056/nejm183311270091602 fatcat:d3764bhbanc53mve67vc557o4i