First principles of medicine / by Archibald Billing.

  • Billing, Archibald, 1791-1881.
Date:
1841
Catalogue details

Licence: Public Domain Mark

Credit: First principles of medicine / by Archibald Billing. Source: Wellcome Collection.

Provider: This material has been provided by the Woodruff Health Sciences Center Library at Emory University, through the Medical Heritage Library. The original may be consulted at the Woodruff Health Sciences Center Library, Emory University.

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    ciple, which is, that it is the tympanic tension which produces the sound. I judge from the expression in the report, that it is impos- sible that the auriculo-ventricular valves should close with ajlap, in the same way as the sigmoid valves. They speak as if the surfaces of the valves flapping together produced the sound, like the click of a solid valve ; and moreover, in conformity with this, in the republication of the same opinion in the Cyclopaedia of Anatomy and Physiology, (article Heart, p. 616,) edited by Dr. Todd, one of the committee, my statement is misrepresented, by saying that the first sound is referred by me to the rapid approximation of the auriculo-ventricular valves; than which nothing is farther from my opinion, which is, that both first and second physiological sounds depend solely on valvular tension.