. Barometric pressure : researches in experimental physiology. Atmospheric pressure; Physiology, Comparative; Anoxemia; Altitude, Influence of. 596 Experiments I can thus diminish the pressure 20 centimeters in 5 minutes, 40 centimeters in 10 minutes. I can get a pressure of 25 centimeters easily enough in 20 minutes; but I have had the greatest difficulty in going below this figure, and could not get below 17 centimeters. We see in the figure an independent cylinder B. I used it as a vacuum reservoir, if I may use this term, in certain experiments. Finally, the tube, which in the figure commu
. Barometric pressure : researches in experimental physiology. Atmospheric pressure; Physiology, Comparative; Anoxemia; Altitude, Influence of. 596 Experiments I can thus diminish the pressure 20 centimeters in 5 minutes, 40 centimeters in 10 minutes. I can get a pressure of 25 centimeters easily enough in 20 minutes; but I have had the greatest difficulty in going below this figure, and could not get below 17 centimeters. We see in the figure an independent cylinder B. I used it as a vacuum reservoir, if I may use this term, in certain experiments. Finally, the tube, which in the figure communicates with a glass bell-jar C, is the one which I later fitted to the table with pneumatic plates represented in Figure Fig. 28—Dog prepared to be placed in the cylinders of Figure 27 and to serve for the extraction of blood under diminished pressure. The extraction of the blood of a dog placed in such an apparatus is a rather difficult enterprise. The animal is first securely attached on its back, as shown in Figure 28, to the uprights of a sort of cage of solid wood, curved so as to conform exactly on its convex edge to the concavity of the cylinder, and capable of being fastened to it by holes which fit over the hooks of strong staples screwed to the sides of this cylin- der. The head of the animal is held in a sort of movable muzzle, which allows the neck to be extended according to the require-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bert, Paul, 1833-1886; Hitchcock, Mary Alice; Hitchcock, Fred Andrews, 1889-. Columbus, Ohio : College Book Company
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