CHANGES PRODUCED" IN AIR BY RESPIRATION. OQl 



hours, the proportion of azote in the lungs might be 

 greater. 



Every 100 parts of oxigen, before it was inspired, con- 

 tained 2*5 azote. 



100 : 2-5 : : 3420 : 85*50; 

 Consequently it contained 85*50 cubic inches of azote. 



From 263-10 



Deduct 85*50 the original azote, 



177*6*0 will be left for the increase of azote. 



Then supposing as before, that the quality of the air in the 

 Kings before the experiment was 84 per cent azote, 16 oxi- 

 gen; and after th« experiment 5*5 per cent azote, 9-4*5 oxi- 

 g-en, as found in the last gasometer, we take 



84 x 



azote at the beginning, 



55 x 



azote at the end ; 



100 



5*5 x , ' 84* 



4- 177*60 *= - — • 



100 T " 100 



177'CO = — _ _ or -84^.055 * = W *, 



177*60 ■ .. V"' .. 



x zz or 220 cubic inches. 



•785 



Hence it appears, that previous to the experiment the lungs 

 contained in this instance 226 cubic inches; and if we sup- 

 pose them to be in the same state after as before the expe- 

 riment, the quality of the gas in each case will be as fol- 

 lows: 



Contents of the Lungs before the Experiment. 



189*84 cubic inches of azote, Contents of the 



36*16 oxigen, luo 6 s befure 



226 



i " Contents 



