EXPLOSIVE COMPOUND OF CHLORINE AND AZOTE. 181 



Oxalate of ammonia, 



Muriate of zinc, with excess of ammonia, 



Muriate of ammonia, and iron by sublimation. 



Those with which we did not succeed in forming it are the Others which 



, :. . did not. 



undermentioned. 



Carbonate of ammonia, 



Triple muriate of platina and ammonia, 



Sulphate of copper, with excess of ammonia. 



We wished to ascertain whether any other solution contain- Nor did m- 



. i , • , r * , ■ r -1 trate °» lead ? 



ing azote might be substituted for the solution of ammoniacal at t j, e m j n j_ 

 salt. The solution which we tried with this view was one of mum. 

 nitrate of lead at a minimum, but we could not obtain by its 

 means any of the explosive compound. We have not yet made 

 any other experiments of this nature. 



There are certain bodies which, if present during the pro- Sulphur, char- 

 cess for forming the explosive compound, prevent its formation, atmoS . a i' r ' 

 or at least prevent it from appearing. Of this description of and hidrog. 

 bodies we have observed the following : §** compound 



Sulphur, in solution in the ammonia, being formed. 



Do. in powder within the receiver, 

 Charcoal in fine powder, adhering to the inte- 

 rior moist surface of the receiver, 

 Carbonic acid gas, equal in volume to one- 

 third the chlorine gas, 

 Atmospheric air, do. do. 

 Hidrogen gas, equal in volume to the chlorine 

 gas. 

 With respect to the temperature best adapted for the forma- It is not form- 

 tion of the compound,*our experiments lead us to quite an op- ^ r ^ ^lo w*" 

 posite conclusion from what has been published. The em- the freezing 

 ploy men t of a freezing mixture, instead of being advanta- P 01n tot water: 

 geous, we have found to be the reverse,, as we have never 

 succeeded in obtaining the compound when the solution and 

 the gas were at a temperature below 32°. In these instances, 

 a thin crystalline icy film, was observed to line the sides of 

 that part of the receiver containing the gas, and unless this was 

 dissolved again by raising the temperature, no explosive com- 

 pound was produced. On the contrary, when we have em- 

 ployed solutions of ammoniacal salts at the temperature of 90 , h^hrTLmne- 

 the explosive compound has been abundantly and quickly ratures. 



formed. 



