On Uespiratwr, 421 



Azote lefore the Experiment. 

 €6 cubic inches atmospheric air, with the animal 



contained -i2^,9g- or - . - - 52-14 



750 of the mixed gases contained -^%% or 49'50 



816 total gas employed 10r64 



The total azote before the experiment was therefore lpl-C4 

 cubic inches. 



Azote ofier the Experiment . 



Respired during 



No. 1. 230. 13 min. 100 : 45 :: 250 : 112-50 



,2. 250. 13min. 100 : 10-4 :: 250 : 26 



3. 250. 17min. 100 : 6*5 : : 250 : 16-25 



66. 100 : 6-5 I : 66 : 4-29 



816 45 min. Azote after experiment 159-04 

 Ditto before 10164 



Increase of azote 57-40 



Calculation for Hydrogen. 



Hydrogen before Experiment. 

 The mixture before the experiment was found to contain 

 71*4 hydrogen. 



100 : 71*4 : : 750 : 535-50 

 Therefore the total quantity must be 535-50 cubic inches. 



Hydrogen after Experiment. 

 No. 1. 250. 100 : 32 : : 250 : 80 

 2> 250. 100 : GGG : : 250 : 166-50 

 3. 250. iOO : 70-5 :: '^'50 : 176-25 

 66inAlOO: 70-5 :: 66 : 46-53 



Hydrogen found aOer experiment 469-2S 



Hydrogen before the experiment 535*50 

 Ditto after - - - 469-28 



Loss of hydrogen - - 66-22 



In this experiment, as well as in those with oxygen, the 



proportion of azote evolved was greater in the eailv ilian in, 



ibe later p-.riods, and it bcct)mes interesting to contrast ibeni : 



D d 4 Thus 



