MOUTH- AND NOSE-BREATHING, BENEDICT APPARATUS. 175 



K. H. A., September 30, 1911. Mouthpiece, 3 periods; nosepieces, 3 periods; 

 periods with mouthpiece and nosepieces in series. In second period with 

 nosepieces, subject asleep for a very short time. Pulse-rate somewhat vari- 

 able. Respiration-rate regular throughout experiment. 



DISCUSSION OF RESULTS. 



The results of the experiments comparing nose- and mouth-breathing 

 with the tension-equalizer unit are given in table 27. The average of 

 the results shows that the respiratory exchange was practically the 

 same with the two methods of breathing, being within such close limits 

 that it is difficult to see any actual difference. The difference between 

 the average results obtained for the carbon-dioxide elimination is 4 c.c. 

 and for the oxygen consumption, 1 c.c. The pulse- and respiration-rates 

 were essentially the same with both methods of breathing. 



TABLE 27. Respiratory exchange in comparison experiments with mouth-breathing and nose- 

 breathing Benedict respiration apparatus (tension-equalizer unit). (Without food.) 



"With bandage. 



