. Barometric pressure : researches in experimental physiology. Atmospheric pressure; Physiology, Comparative; Anoxemia; Altitude, Influence of. 758 Experiments To measure the quantity of air expired, I found nothing more convenient or more accurate than a gasometer. The one I had made especially for this purpose and which is pictured in Figure 63, has several dials, by means of which one can estimate the volume of air which has passed through the apparatus to within 50 Fig. 63—Gas meter for measuring respiratory movements. When it was necessary to measure the maximum expirations, I stood
. Barometric pressure : researches in experimental physiology. Atmospheric pressure; Physiology, Comparative; Anoxemia; Altitude, Influence of. 758 Experiments To measure the quantity of air expired, I found nothing more convenient or more accurate than a gasometer. The one I had made especially for this purpose and which is pictured in Figure 63, has several dials, by means of which one can estimate the volume of air which has passed through the apparatus to within 50 Fig. 63—Gas meter for measuring respiratory movements. When it was necessary to measure the maximum expirations, I stood up, with my garments loosened, and after the inspiration, I took in my mouth, without any supplementary tube, the pipe leading to the gasometer and exhaled rather slowly until the lungs were empty, my nose, of course, being closed tightly by my left hand; I thus made at least 10 expirations, of which I took the average. The same arrangement was used when I wished to exhale into a rubber bag to check the quantity of carbonic acid produced in a given time. I generally breathed for 10 minutes into the bags; then the air from them was passed for a whole night through the potash bubblers which I shall describe later; there it was completely freed. 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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Keywords: ., bookcentury1900, booksubjectatmosphericpressure, booksubjectphys
