NO. 2$ 



INFLUENCE OF ATMOSPHERE ON HEALTH 



December 14, WW. Series I. H. B. W. lifted weight [2 times per minute 

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



Average volume breatbed, 22 liters per minute. Average tidal air, 1.407.4 cc. 



Pulse records: During 3d minute, 112 per minute; 5th minute, io<S; 71 li 

 minute, 89. 



Series II. CO? absorbed and fans on. 



Average volume breatbed, 24 liters per minute. Average tidal air, 1,603.2 cc. 



Pulse records: During 3d minute, 97 per minute; 5th minute. 99; 7tli min- 

 ute, 91. 



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



Sample taken and fans put oft'. Analysis: CO2 3.34 per cent; O- 17.89 per 

 cent. 



Series III. CO2 on and fans off. 



Average volume breathed, 36 liters per minute. Average tidal air, 2,448.6 cc. 



Pulse records: During 3d minute, 120 per minute; 5th minute, 11S; 71I1 

 minute. 106. 



