TENSION-EQUALIZER AND SPIROMETER UNITS. 



113 



J. K. M., May 28, 1912. — Spirometer unit, 2 periods; tension-equalizer 

 unit, 2 periods; apparatus alternated. Subject drowsy toward the end of the 

 experiment and it was difficult to keep him awake. Pulse-rate uniform in 

 most of the periods except in the last period with the spirometer unit, when the 

 pulse-rate was higher in the first part of the period than later. Respiration 

 uniform in character and depth throughout experiment. 



DISCUSSION OF RESULTS. 



In table 15 the results are given not only for each period of the experi- 

 ment but also an average for each apparatus in the individual experi- 

 ments and for all of the periods in the 9 comparisons. The data in the 

 table include the time of beginning the periods, the averages for the 

 carbon-dioxide elimination and oxygen consumption, the respiratory 

 quotient, and the average pulse- and respiration-rates. The average 

 values obtained with the two methods are as follows: Carbon-dioxide 

 elimination, 197 c.c. for the tension-equalizer unit and 198 c.c. for the 

 spirometer unit; oxygen consumption, 231 c.c. and 233 c.c. respectively; 

 respiratory quotient, 0.855 and 0.850; pulse-rate, 58.5 and 59.5; and 

 the respiration-rate, 12.8 and 14.1. These grand averages show an 

 extraordinarily good agreement. 



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

 respiration apparatus. (Without food.) 



1 Subject took light breakfast. 



