The sphygmograph and the physiology of the circulation : a monograph read before the Medical Society of New Jersey, upon investigations made preparatory to a larger work on the practical value of the sphygmograph . 10.—Nearest Approach to Radial Pulse, Reversed. 12 THE SPHYGMOGRAPH, STREAM. Great pressure; common * inch tube; distalobstruction; continuous current. 11.—Same, but interrupted current. 12.—Same, with increased pressure and Two points only will at this time be referred to regardingthe experiments made with the rubber heart. The first touchesthe transmissi
The sphygmograph and the physiology of the circulation : a monograph read before the Medical Society of New Jersey, upon investigations made preparatory to a larger work on the practical value of the sphygmograph . 10.—Nearest Approach to Radial Pulse, Reversed. 12 THE SPHYGMOGRAPH, STREAM. Great pressure; common * inch tube; distalobstruction; continuous current. 11.—Same, but interrupted current. 12.—Same, with increased pressure and Two points only will at this time be referred to regardingthe experiments made with the rubber heart. The first touchesthe transmission of impulse; the second, the origin of the firstand second sounds. The violent and sudden contraction ofthe heart was observed to produce acceleration at the auricle,or what is really the distal end of the circulating apparatus,in about one second, the usual interval between the healthybeats of the normal heart; consequently, when I caused a newcontraction of the ventricle, the fluid from the former was AND THE PHYSIOLOGY OF THE CIRCULATION. 13 already pouring into the auricle, as is presumed to be the casein the natural organ. Now the relative calibre of the veinsto arteries in this apparatus, is not, as in the human heart, astwo to one, but considerably less, to accommodate the far lessdistance to be traversed by the fluid, so that the fact of theinterval of transmission of impulse I have assumed to be evi-dence of sufficient approximation to nature
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