386 On Respiration. 



atmospheric air were admitted into the mercurial gasometer 

 communicating with B : the gasometer communicating w ith 

 C was quite eiiiptv, the apparatM^ being tried was found 

 perfectly air tight, and the whoie quantity of air 310 cubic 

 inches. 



The cocks H and I being opened, gentle pressure was 

 made upon tht glass of gasometer B, so as to cause the air 

 to pass through A, which consequently drove an equal por- 

 tion tiirougb the tube C into the empty gasometer; aquar- 

 ter of an hour was employed in passing the gas, which 

 measured exactly 250 cul)ic inches in C, so that there was 

 no alteration of volume ; the cocks H and I were now 

 closed, and the respired air being examined by the usual 

 methods, 100 parts were found to contain 

 5 carbonic acid 

 16 oxygen 

 79 azote 



100 



As the air after the experiment had experienced no altera- 

 tion of volume, and as it contained tlie same proportion of 

 azote as atmospheric air, this substance had remained un- 

 altered. But 15'50 cubic inches of oxygen had been con- 

 verted into carbonic acid gas. 



100 : 5 T: 310 : 15-30. 



Summary of the Experiment. 



Cub. in. of 



■o rr-t , Atmos. air Ga^ after Cub. inches caib. acid ,p. 



Bar. Tlierm. ... . . r i • i ■ . Time. 



inspired, experiment, ofcarb.acid. per minute. 



30° 43' 310 310 15 ;j •Q<2 25 min. 



Experiment II. Atmospheric Jl'ir. , 

 The experiment was repeated in exactly the same man- 

 ner ; the animal, except from confinement, appeared much 

 at his case all the time. The air after the e.\pcriment con- 

 tained in 100 parts 



b'5 carbonic acid 

 15'5 oxygen 

 79 azote 



100 



Here the projfbrllons of azote were undisturbed, arid ] 7*03 

 cubic inches of carbonic acid procured. 



100 : 5-5 : : 310 : 17*05. 



Summary 



