. Carnegie Institution of Washington publication. DOUGLAS AND BENEDICT METHODS. 161 in the measurements. The respiratory quotient shows a slightly better uniformity with the Tissot apparatus than with the spirometer unit. On the whole, the results indicate that with good subjects it is possible to obtain comparable results in the measurement of the respiratory exchange with both types of apparatus. CARBON DIOXIDE [UMINATI 100 TOTAL VENTILATION VOLUME PfJ DCSPIRATION- OXYCEN ABiOWfr RESPIRATORY cm TlfNl SPIROMETER UN!T I 2 3 A 5 6 7 8 9 10 I I 12 13 14 15 0 I 3 4 5 6 7 8 9 10 I I 12 13 14 PER C
. Carnegie Institution of Washington publication. DOUGLAS AND BENEDICT METHODS. 161 in the measurements. The respiratory quotient shows a slightly better uniformity with the Tissot apparatus than with the spirometer unit. On the whole, the results indicate that with good subjects it is possible to obtain comparable results in the measurement of the respiratory exchange with both types of apparatus. CARBON DIOXIDE [UMINATI 100 TOTAL VENTILATION VOLUME PfJ DCSPIRATION- OXYCEN ABiOWfr RESPIRATORY cm TlfNl SPIROMETER UN!T I 2 3 A 5 6 7 8 9 10 I I 12 13 14 15 0 I 3 4 5 6 7 8 9 10 I I 12 13 14 PER CENT or VARIATION. FIG. 44.—Probability curves for the series of comparison experiments with the spirometer unit and the Tissot apparatus. The ordinates indicate the percentage of the total number of periods and the abscissae the percentage of variation from the average. DOUGLAS RESPIRATION APPARATUS AND BENEDICT RESPIRATION APPARATUS (SPIROMETER UNIT). Although the Douglas respiration apparatus had not been used in this laboratory for regular respiration experiments, it was deemed advisable to compare the gaseous metabolism as measured by the Douglas method with that measured by the spirometer unit. A de- scription of the Douglas method has been given in a previous section of this For the earlier experiments in the series a bag was purchased which was made from a fairly good grade of rubber and was supplied with a tube leading into it through which air could be introduced. This bag was supposed to have a capacity of 100 liters, but it was found that it p. 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 Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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