NO. 23 



INFLUENCE OF ATMOSPHERE ON HEALTH 



77 



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

 atmosphere of chamber with CO--. Sample taken. 'Analysis: CO, 3.09 per 

 cent; O2 18.51 per cent. 



Series II. CO, and fans on. 



Average volume breathed, 36.4 liters per minute. Average tidal air, 1,916.62 

 cc. 



Pulse rate during 1st minute, 120; 2d minute, to6; 3d minute, 108; 4th 

 minute, 108; 5th minute, 106. 



Sample taken : Analysis : CO, 3.86 per cent ; O, 17.19 per cent. 

 Air in chamber cooled (io° F. wet bulb) by means of water cooler and fans 

 put on. 



Average volume breathed, 40.S liters per minute. Average tidal air, 2,211.94 

 cc. 



Pulse rate during 1st minute, no; 2d minute, 92; 3d minute, 92; 4th minute, 

 90; 5th minute, 91. 



Sample taken. Analysis: CO, 4.56 per cent; O2 15.95 per cent. 



August 16, 1911. Series I. R. A. R. lifted weight 12 times a minute for 

 series of 5 minutes. CO, and fans off. 



Average volume breathed, 28.6 liters per minute. Average tidal air, 2,219.6 cc. 



