TENSION-EQUALIZER AND SPIROMETER UNITS. 



115 



Table 15. — Respiratory exchange in comparison experiments with the two types of the Benedict 

 respiration apparatus. (Without food.) — Continued. 



1 Carbon dioxide present in system; omitted from average. 



2 Valve turned too late at beginning of period ; omitted from average. 



'Omitted in calculating the average for the experiment. 



To find whether this agreement is actual, the differences in each 

 experiment between the averages for the two apparatus are brought 

 together in table 16, the values obtained for the spirometer unit being 

 used as the base-line. In some cases the difference found is some- 

 what larger than is indicated by the grand averages in table 15, the 

 greatest difference being with S. A. R. on March 23, 1912. In the other 

 experiments the differences found are no larger than would be expected 

 under the conditions of experimenting. 



In this summing up of results, not only the averages should be con- 

 sidered, but also the general picture of the respiratory exchange as 

 measured by the two types of apparatus. A careful examination of the 



