136 



COMPARISONS OF RESPIRATORY EXCHANGE. 



DISCUSSION OF RESULTS. 



The results of the experiments are given in table 19, with an average 

 for each apparatus for every experiment and a general average for each 

 apparatus for the whole series of comparisons. The greatest average 

 difference in the respiratory exchange with the two methods is shown in 

 the results for the carbon-dioxide elimination, that with the Zuntz- 

 Geppert apparatus being 176 c.c. and for the spirometer unit 182 c.c. 

 The average oxygen consumption with the two apparatus is nearly 

 identical, i. e., 220 c.c. for the Zuntz-Geppert apparatus and 219 c.c. for 

 the spirometer unit; the respiratory quotient is 0.80 for the Zuntz- 

 Geppert apparatus and 0.83 for the spirometer unit. The average 

 pulse-rate is 58.5 for both apparatus. There is only a slight difference 

 in the average respiration-rate, which is 12.3 for the Zuntz-Geppert 

 apparatus as compared with 12.5 for the spirometer unit. The average 

 ventilation per minute and volume per respiration are slightly lower with 

 the Zuntz-Geppert apparatus (4.45 liters and 448 c.c., respectively) than 

 with the spirometer unit (4.76 liters and 480 c.c., respectively). 



TABLE 19. Respiratory exchange in comparison experiments with the Zuntz-Geppert apparatus 

 and the Benedict respiration apparatus (spirometer unit). (Without food.) 



