on a new detonating Substance, 24,7 



In another experiment, one grain of the compound afforded 

 1,625 cubic inches of chlorine. 



In a third experiment, one grain produced only 1,52 cubic 

 inches. 



In the two last experiments the compound was acted upon 

 much more slowly, and the gas generated exposed to a much 

 larger surface of solution of muriatic acid, and the appearance 

 of a smaller relative proportion of chlorine must be ascribed 

 to the absorption of a larger proportion of that gas by the 

 liquid acid ; and I found by exposing concentrated solution of 

 muriatic acid to chlorine, that it soon absorbed nearly its volume 

 of that gas. 



I attempted to remove the source of error in the experi- 

 ment, by using liquid muriatic acid holding chlorine in solu- 

 tion ; but in this case the quickness of the action of the com- 

 pound on the acid was greatly diminished, and it not being 

 easy to obtain the point of absolute saturation of the acid with 

 chlorine, some of the gas was absorbed in the nascent state 

 during its slow production ; and in most of my experiments 

 made in this manner, I obtained less chlorine from a given 

 weight of the compound, than in operating on pure solution of 

 muriatic acid. 



Liquid muriatic acid, whether concentrated or diluted in its 

 pure state, does not affect the colour of the sulphuric solution 

 of indigo; but it is immediately destroyed by solutions contain* 

 ing chlorine dissolved in them. The quatitity of solution of 

 indigo, which is deprived of colour by a given quantity of so- 

 lution of chlorine, is directly as the proportion of chlorine it 

 contains; and I found that the same quantity of chlorine, whe- 

 ther dissolved in a large or a small quantity of solution of 



