and Oxygen Gas hy Respiration. 263 



100 : >2'5 ;: 3420 : 85-50; 

 Consequently it contained 85-50 cubic inches of azote. 

 From 263-10 

 Deduct S5-50 the original azote, 



1 77'GO will be left for the increase of azote. 



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

 lungs, before the experiment, was 81 per cent, azote, 16 

 oxygen, and after the experiment 5*5 per cent, azote, Qi'5 

 oxygen, as found in the last gasometer, we take 



— azote at the beginning;, 



100 ° *'• 



— azote at the end ; 



100 



— ■ i 177'60= — 



100 100 



177*60 = — — — or -84a? — '055x = \785#, 



100 100 ' 



x — 17 — or 226 cubic inches. 



•785 . 



Hence it appears, that previous to the experiment, the lungs 

 contained in this instance 226 cubic inches; and if we suppose 

 them to be in the same state after, as before the experiment, 

 the quality of the gas in each case will be as follows : 

 Contents of the Lungs before the Experiment. 

 189*84 cubic inches of azote, 

 36-16 oxygen. 



226 



Contents of the Lungs after the Experiment, 

 12-43 cubic inches of azote, 

 213-57 oxygen. 



226 



Calculation for Oxygen. 

 3420 — S5-50 = 3334-50 original oxygen, 



Add 36- 1 6 in the lungs before the experiment. 



_ fifi f total quantity of oxygen before 

 1 the experiment. 



R4 After 



