198 



COMPARISONS OF RESPIRATORY EXCHANGE. 



TABLE 35. Respiratory exchange in comparison experiments with Benedict respiration 

 apparatus (spirometer unit) and Mueller valves with Tissot spirometer. (Without 

 food.) (Continued.) 



The differences shown in the individual experiments are given in 

 table 36, the experiments with the spirometer unit being used as a base- 

 line. An examination of the figures in this table shows that the differ- 

 ence is not so uniform as would appear from the averages. For 

 example, with W. J. T. the carbon-dioxide elimination is noticeably 

 higher with the Mueller valves and the volume per respiration and 

 ventilation per minute very much larger than with the spirometer 

 unit. On the contrary, with J. J. G. the carbon-dioxide output is a 

 little lower and the oxygen consumption slightly higher with the 

 Mueller valves. The difference between the respiratory quotients in 

 all of the experiments is very marked. The pulse-rate is in general 

 higher with the Mueller valves than with the spirometer unit. 



Many of the periods included in this comparison series would un- 

 doubtedly be excluded if only the normal figures were being considered. 

 For example, the high carbon-dioxide elimination in the last period with 

 the spirometer unit in the experiment with W. J. T. on March 18, 1913, 



