Experimental researches on the influence exercised by atmospheric pressure upon the progression of the blood in the veins : upon that function called absorption, and upon the prevention and cure of the symptoms caused by the bites of rabid or venomous animals ... / by David Barry.
- Barry, David, Sir, 1780-1835.
- Date:
- 1826
Licence: Public Domain Mark
Credit: Experimental researches on the influence exercised by atmospheric pressure upon the progression of the blood in the veins : upon that function called absorption, and upon the prevention and cure of the symptoms caused by the bites of rabid or venomous animals ... / by David Barry. Source: Wellcome Collection.
Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.
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![During the various trials and repetitions of this experiment which I made upon horses. I had oc- casion to remark, 1. That when the animal was standing, although the coloured liquid invariably rose in the tube, atmospheric pressure was never so distinctly marked as when he was prostrate. This I proved by experimenting upon the same animal in both positions, 2. That the connexion between the motions of the liquid in the tube and the respiration can- not be satisfactorily observed while the horse is standing, because his breathing when in the erect posture, and at rest, is scarcely, if a]t all, per- ceptible. 3. That when the respiration became hur- ried from whatever cause, or when it was em- barrassed by disease, there was frequent regur- gitation of blood through the tube, but never once did this occur except at the moment of expiration, and never under any circumstance did the liquid ascend in the tube, except at the moment of in- spiration. This experiment, repeated upon the anterior and posterior cava? of dogs, afforded similar results. Here it is essential to remark, that if the com-](https://iiif.wellcomecollection.org/image/b2104000x_0040.jp2/full/800%2C/0/default.jpg)
