270 Messrs. Allen and Pepys on the Changes produced in 
displaced. Admitting then that the air contained in the lungs, 
before the experiment, consisted of 16 oxygen, 84 azote, and 
.at the conclusion of the experiment of 94 oxygen, 6 azote, 
then we have 
azote at the begining, 
azote at the end. 
6x 
ioc> 
+ 
110 = 
84X 
100’ 
110 = — or, 84a: — .0 6x = .78a;. 
100 100 ’ ^ / 
x — or 141 cubic inches ; 
Therefore upon this calulation it appears that 141 cubic inches 
of gas remained in the lungs after a forcible attempt at expira- 
tion ; then the state of the lungs before the experiment must 
have been 
118.44 azote, 
22.56 oxygen. 
14 1 
And after the experiment* 
132.54 oxygen, 
8.46 azote. 
14 1 
Calculation on total Quantities. 
Azote before the experiment 8 1 .50 cubic inches, 
■ contained in the lungs 118,44 
19994s 
