^t on 



^n of white 

 eredi. This 

 divided into 

 d to remaio 

 'ops of Zip 



a very 

 iced a sligl 

 lance of 

 lich formerlf 



L 



h of the two 



small 



iece 



of 



jach, so 



ast« 



y 



side to » 



^fter 



twentf 



erely s^'' 



eJ 



[Tie 



of n'J- " 



:r, very P 



, .arliff 



ied b^'^^' 



een 



/ 



t:^^ beginnings of life. 



I 



i 



> 



395 



a more decided opalescence approaching to cloudiness ^ 

 though that which had been rendered faintly alkaline 

 had a distinctly opaque whitish colour^ and there was 

 also a distinct pellicle^ covering more than one-half of 

 the surface of the fluid. 

 days the amount of opacity, of pellicle, and of deposit 



In the three or four succeeding 



increased in both the fluids 



though 



each of these 



continued to be more manifest in the alkaline than in 

 the acid solution. After a week, however, the difference 

 was scarcely appreciable, though on the whole, for 

 about two weeks afterwards, the quantity of new matter 

 seemed to be greater in the alkaline than in the acid 



solution. 



But, on the same morning that these two portions of 

 the acid and alkaline infusions had been set aside for 

 observation, I had placed with them vessels containing 

 two other specimens of the same fluids. These had 

 been previously treated in the following manner. The 

 acid and the alkaline fluid were placed in their re- 

 spective flasks, and after the necks of these had 

 been drawn out the fluids were boiled for ten minutes. 

 At the expiration of this time, and whilst ebullition 

 was still continuing, the drawn-out necks of the 

 flasks were hermetically sealed in the blow-pipe flame. 

 These experiments were undertaken in order to show, by 

 comparison with the other two^ whether the difference 

 produced by mere acidity or alkalinity of the solutions 

 at low temperatures was or was not intensified by the 

 action of heat. The flasks were all suspended in a 



r-" 



