224 



COMPARISONS OF RESPIRATORY EXCHANGE. 



TABLE 41. Respiratory exchange in comparison experiments with the Tissot apparatus with 

 and ivithout automatic counterpoising of the spirometer bell. (Without food.} Cont. 



are not very large, varying from 11 c.c. to -f-13 c.c. for the carbon- 

 dioxide elimination and from 17 c.c. to +8 c.c. for the oxygen con- 

 sumption. The average respiratory quotient is practically identical for 

 the two methods in all of the experiments. The pulse-rate is slightly 

 lower in the periods with the counterpoise, but the other factors do not 

 show large variations either way. 



The percentage variations of the results of the individual periods 

 from the averages of the experiments have also been calculated for this 

 series and are plotted as curves in figure 74. On the whole the periods 

 without the counterpoise show a slightly greater degree of uniformity 

 than do those with the counterpoise, but the difference is not marked 

 with any of the factors measured. 



