On Respiration, 417 



Calculation for Azote, 



1000 cubic Inches containing 5 per 



cent, azote - - - - 50 



60 atmospheric air, containing 79 per cent. 47*40 



Total azote before experiment, 97*40 

 Ditto found after experiment, 147*52 



Increase of azote, - - 50' 1 2 



This increase of azote was much more than equal to the 

 cubic contents of the animal's body, the deficiency of 4 

 cubic inches was doubtless oxygen absorbed. 



Summary of the Experiment . 



rii 



« H O.S OS O 0<2 Od, H OS <^ 

 ?9-05 57" 1060 1056 4 106 1'48 Ih. ISm. 54-07 50-13 



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, 

 beside 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 appeared 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 incon- 

 venience, except from the confinement. 



State of the Gas before Respiration. 



Oxygen. Azote. 



66 cubic inches of atmospheric air, = 13-86 52-14 

 750 oxygen, containing 5 percent, azote, = 712*50 37*50 



816 total consisting of 726*36 89*64 



Tlie oxygen was tried before as wtll as after the experi- 

 ment, and both the results agreed perfectly with each other. 

 Vol. 34. Nw. 140. Due. 1809. D d W^ 



