4t S Messrs. Allen ^^Pepys on Respiration . 
Experiment V. Oxygen. 
In this experiment we employed a smaller pig, which oc- 
cupied the space of 33 cubic inches, and our object was to 
keep him for the same length of time in a smaller quantity of 
gas, we therefore only used 750 cubic inches of oxygen, be- 
side the common air contained in the glass A, and tube, 
amounting to 66 cubic inches ; the first 250 cubic inches were 
passed through the glass A into C in 24 minutes, where it ap- 
peared to have undergone no alteration of volume. 250 
-cubic inches more were passed during the next 23 minutes, 
and these measured 248 in C ; the last 250 were passed in 24 
minutes, and the volume remained unaltered. The animal did 
not appear to suffer the slightest inconvenience, except from 
the confinement. 
State of the Gas before Respiration. 
Oxygen. Azote. 
66 cubic inches of atmospheric air, = 13,8b 52,14 
750 oxygen, containing 5 per cent, azote, = 7 12,50 37,50 
816 total consisting of 726,36 89,64 
The oxygen was tried before, as well as after the experiment, 
and both the results agreed perfectly with each other. We 
now examined portions of gas preserved from the three 
gasometers, with lime water, and the tests for oxygen. 
