NO. 23 INFLUENCE OF ATMOSPHERE ON HEALTH /^ 



Series II. CO^ on and fans off. 



Average volume breathed, 41.6 liters per minute. Average tidal air, 2,542.14 



Pulse rate during 1st minute, 140; 3d minute, 120; 5th minute, 110. 

 Air chamber cooled 14 F. (wet bulb) by means of water cooler. 



Series III. CO? on and fans off. 



*Note retardation. 

 Average volume breathed, 48 liters per minute. Average tidal air, 2,542.66 cc. 



Pulse rate during 2d minute, 100; 3d minute, 94. 



Sample taken. Analysis: CO, 5.31 per cent; O2 16.54 P er cent. 



July 28, 1911. Series I. H. B. W. lifted weight 12 times per minute for 

 series of 5 minutes. Fans off. Ordinary air in chamber breathed. 



Average volume breathed, 25 liters per minute. Average tidal air, 1.443.04 cc. 



Pulse rate during 1st minute, 142; 2d minute, 118. 



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

 the atmosphere of chamber with CO... Analysis C< '_• 5.09 per cent : Os 16.71 

 per cent. 



