Adeney — Dissolved Gases and Fermentative Changes. bib 



The next series of experiments wliich I have to describe were made with 

 solutions of definite chemical compounds, and it will, I think, be also of advantage 

 to discuss them, not in their chronological order, but in such a way as may best 

 serve to bring out the points I am anxious to establish in this research. 



I will therefore first describe a series of experiments carried on with a solution 

 of asparagine and crystallized potassium sodium tartrate. A strong solution was 

 made up, containing 0'066, and O'lil grammes of these bodies, respectively; also 

 O'l gramme of potassium phosphate per litre of solution ; only two dilutions were 

 made from this, it being determined to commence the experiments with a 

 considerable quantity of each solution in several bottles, and if necessary, after 

 determining the products of a fermentation, to re-aerate and analyse, and to put up 

 again in smaller bottles for a further fermentation. It was hoped by this means 

 to gain, more especially, definite information on the question whether ammonia 

 was formed during the first stage fermentation of a nitrogenous substance, in the 

 continued presence of an excess of dissolved oxygen or not. 



There were other reasons for making this modification in detail of the method 

 of examination, which will appear as the results of the experiments are considered. 



The full particulars of these experiments are given in the subjoined Tables 

 VII. and VIII. 



[Tables VII. and Vlll. 



