14 



Proceedings of the Royal Irish Academy, 



The changes in composition of the gases in the atmosphere of the 

 flasks, and in the solutions, indicated in the preceding Table of 

 Analyses, may be summarized as follows : — 



No. COo O2 N2. 



6 + 35-54 - 32-63 + 1-31 



7 + 65-25 - 51-20 + 0-26 



8 + 68-58 - 72-52 - 0*53 



9 + 62-33 - 82-84 + 0'05 



Table IV., 



Stating the results due to respiratory and enzymic changes respec- 

 tively, in percentages, as in Table II. 



Eesults of 

 Respiratory Changes. 



Enzymic 

 Changes. 



Oxygen absorbed by other 

 Physiological Processes. 



No. 



CO2 



NH3 



N2O3 



O2 



CO2 



NH3 





6 



77-0 



48-5 



24-3 



83-9 



23-0 



21-6 



16-1 



7 



67-8 



43-1 



21-5 



86-5 



32-2 



30-7 



13-5 



The figures in the foregoing Tables again prove that the inorganic 

 products are nearly all accounted for, when distributed in accordance 

 with equations 1 and 2 ; and they afford additional evidence that the 

 principle upon which the division has been made is well founded. 



It is evident from the analytical results recorded for experiment 6, 

 Table IV., that the urea originally present in solution had by no means 

 undergone complete metabolic change. 



Of the products formed in this experiment, 77 per cent, of the total 

 carbon dioxide was the result of the respiratory change, and 23 

 per cent, the result of enzymic action ; while, of the total inorganic 

 nitrogen products, 72-81 per cent, was the result of respiratory change, 

 and 21-58 the result of enzymic action, leaving 5*6 per cent, of those 

 products unaccounted for. 



