on the Protochloride and Peroxide of Mercury. 509 



niuret into ammonia and peroxide ; but, from the commence- 

 ment to the termination, there are disengaged water, ammonia, 

 azote, oxygen and metallic mercury. The ammoniuret, like 

 many other mercurial compounds, is dark-red when hot, but 

 of a whitish colour when cold. When a quantity of the ammo- 

 niuret is suddenly thrown on ignited coals it explodes very 

 feebly, and far inferiorly to fulminating gold, with which its 

 discoverers have compared it : it dissolves readily in nitric or 

 muriatic acid. 



To analyse this compound, processes of a simple nature 

 were sufficient. 



A. — 72*07 grains of ammoniuret were dissolved in muriatic 

 acid, and the liquor having been diluted was decomposed by 

 sulphuretted hydrogen. The resulting sulphuret dried and 

 weighed, amounted to 70*08 grains, consisting of 



Sulphur 9*61\ 



Mercury 60*47 J 



The liquor and washings evaporated to dryness, gave sal- 

 ammoniac, 9*21 grains, consisting of 



Muriatic acid 6*28 



Ammonia 2*93 



Hence, supposing the mercury to exist as peroxide, we have 

 as the result of the analysis : 



Mercury 60*47 



Oxygen 4*78 



Ammonia 2*93 f 



Water and loss 3*89 J 



or in one hundred parts — 



Mercury 83*90" 



Oxygen 6*63 



Ammonia 4*07 



Water and loss 5*40 



2. — The following analysis was made on a portion of am- 

 moniuret prepared at a different time and in another manner 

 than that used in the former experiment. 



67*57 grains were dissolved in muriatic acid and decom- 

 posed by a stream of sulphuretted hydrogen. The precipi- 

 tated sulphuret weighed 65*37 grains, consisting of 



Sulphur 8*96\ 7 



Mercury 56*41 J 00 ' 



The liquor evaporated to dryness gave 8*15 grains of sal- 

 ammoniac, consisting of 



Muriatic acid 5*54l 



Ammonia 2*61J 



72-07 



