62 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6o 





Average volume breathed, 20 liters per minute. 



Average volume breathed, 40.8 liters per minute. Increase, 91 per cent. 



Sample taken. Analysis : C0 2 4.54 per cent ; O2 16.33 pe r cent. 

 The temperature was high and the cooling effect of fans lowered the 

 pulmonary ventilation greatly, as well as the pulse rate. 



Average volume breathed, 9.3 liters per minute. 



