J2 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 60 



Series IV. C0 2 and fans on. 



Average volume breathed, 44 liters per minute. Average tidal air, 2,172.9 cc. 



Pulse records: During 3d minute, 115 per minute; 5th minute, no; 7th 

 minute, 107. 



Sample taken. Analysis : C0 2 3.97 per cent; O2 17.4 per cent. 



December 21, 1910. Series I. R. A. R. lifted weight 12 times per minute 

 for series of 5 minutes. CO2 absorbed and fans off. 



Average volume breathed, 20 liters per minute. Average tidal air, 982.5 cc. 

 Pulse rate during 3d minute, 97 per minute; 5th minute, 82; 7th minute, 78. 

 Series II. C0 2 absorbed and fans on. 



Average volume breathed, 22 liters per minute. Average tidal air, 1,328.86 cc. 



Pulse rate during 3d minute, 96 per minute; 5th minute, 02; 7th minute, 90. 



CO2 let into chamber and fans put on to thoroughly mix the atmosphere 

 of chamber. Sample taken. Analysis : CO2 2.62 per cent ; 2 19.8 per cent. 



