276 Messrs. Allen and Pepys on the Changes produced in 
— ' + 177.60 = — 
100 8 11 100 
177.60= ^ or .84 x — .055 x = .785X, 
x = oi' 226 cubic inches. 
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 — 85.50 == 3334-50 original oxygen, 
Add 36. 1 6 in the lungs before the experiment, 
66 f tota ^ *l uantit y oxygen before 
[ the experiment. 
