424 Messrs. Allen and Pepys on Respiration. 
No. 2. 250. Respired during thirteen minutes ; 100 parts 
were reduced by lime water to 92,5, and these by the tests 
for oxygen to 77. Of these 77 parts, 20 being mixed with 10 
of oxygen, and detonated, were diminished to 4, and these 4 
being examined for oxygen left 3, which must be azote : 
From these 3 
Deduct ,3 for azote in the 10 parts oxygen. 
Leaves 2,7 for the azote contained in 20 
parts of the residual 77. 
20 : 2,7 : : 77 : 10,4 
No. 2, therefore consisted in 100 parts, of 
7.5 carbonic acid, 
1 5.5 oxygen, 
20.4 azote, 
66.6 hydrogen, 
100 
No. 3. 250. respired during seventeen minutes ; ex- 
amined as above, consisted in 100 parts, of 
6 carbonic acid, 
17 oxygen, 
6.5 azote, 
70.5 hydrogen, 
100 
the 66 remaining with the animal at the close of the experi- 
ment, may be considered as very nearly the same as No. 3, 
In this, as in the former experiment, we observed that the 
evolution of carbonic acid was greatest at the middle of the 
time, but was considerably diminished toward the end, as the 
pig became sleepy ; it is not improbable therefore, that dur- 
