74 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 60 



CO- let into chamber. Fans put on to thoroughly mix atmosphere. Sample 

 taken. Analysis: CO2 2.36 per cent; O2 17.42 per cent. 



Series III. CCL on and fans off. 



Average volume breathed, 40.6 liters per minute. Average tidal air, 1,862.39 



Pulse rate during 3d minute, 138 per minute; 5th minute, 120; 7th minute, 



Series IV. CO2 and fans on. 



Average volume breathed, 34 liters per minute. Average tidal air, 1,909.9 cc. 



Pulse rate during 3d minute, 118 per minute; 5th minute, 108; 7th minute, 

 100. 



Sample taken. Analysis: C0 2 4.13 per cent; O2 15.3 per cent. 



August 2, igu. Series I. R. A. R. lifted weight 12 times per minute for 

 series of 5 minutes. C0 2 absorbed and fans off. 



Average volume breathed, 28 liters per minute. Average tidal air, 1,950.02 cc. 



Pulse rate during 3d minute, 100; 5th minute, 100. 



CO2 let into chamber from bag outside. Fans put on to thoroughly mix the 

 COs with atmosphere of chamber. Sample taken. Analysis: CO2 2.24 per 

 cent ; O2 18.57 per cent. 



