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SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 60 



Series II. C0 2 absorbed by soda lime and fans on. 



Average volume breathed, 26 liters per minute. Average tidal air, 1,676.0400. 



Pulse records: At the end of 1st minute, no per minute; 4th minute, 106: 

 6th minute, 100. 



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

 phere. Sample taken. Analysis: CO2 3.45 per cent; 0-j 17.64 per cent. 



Series III. C0 2 and fans off. 



Average volume breathed, 46 liters per minute. 



Pulse records: At end of 1st minute, 130 per minute; 2d minute, 114; 4th 

 minute, 98 ; 6th minute, 94. 



Series TV. CO; and fans on. 



Average volume breathed, 57 liters per minute. Increased, 118 per cent. 



Pulse records: At the end of 1st minute, 120 per minute; 2d minute, no; 

 4th minute, 100; 6th minute, 100. 



Sample taken. Analysis: COa 4.25 per cent; Os 16.55 1 H>I " cent. 



