Messrs. Allen and Pepys on Respiration. 
415 
cubic inches of atmospheric air through it, which measured 
jooi : portions of the respired gas had been preserved in the 
mercurial bath, and the usual trials made upon the mixture, 
which was found to contain 3 parts of carbonic acid in every 
100, or 33 cubic inches in the whole quantity ; the azote was 
unaltered ; 100 : 5 : : 1060 : 53. 
Barom. 
23,8 
Summary of the Experiment. 
Therm. 
Atmos, air Air after 
before expt. expt. 
56° 1060 . 106l 
Increase. 
Carb. acid, 
found. 
1 53 
Carb. acid 
per minute. 
,88 
Time. 
1 hr. 
Experiment' IV . Oxygen Gas. 
The pig hitherto employed was put into the glass vessel 
A, which with the tube contained 60 cubic inches of atmos- 
pheric air; 250 cubic inches of oxygen, containing 5 per cent, 
of azote, were admitted into the gasometer communicating 
with B, and during a quarter of an hour were made to pass 
slowly through the vessel in which the animal was confined, 
to the empty gasometer communicating with C, where it mea- 
sured exactly 250 cubic inches ; a portion was preserved in 
the mercurial bath for examination, and the gasometer B was 
replenished with 250 cubic inches of the same oxygen ; this 
was passed in about the same time as before, through A into 
gasometer C, when it measured 248 cubic inches. 
230 cubic inches more of the oxygen were now admitted 
into gasometer B, and passed in the same manner through A 
into C, where they measured 249. 
The gasometer B was for the fourth and last time supplied 
with 250 cubic inches more of the oxygen, which were passed 
as before, through A into C, during about a quarter of an 
hour, and then measured 249. 
3 H 2 
