. Dr. Kane on the Compounds of Ammonia. 89 



When heated It fuses into a clear liquid, giving off at the same time azote 

 and ammonia, but no water, if the precipitate had been completely dried. The 

 fused substance sublimes ultimately in a mass partly transparent like gum, and 

 partly white and opaque. When the sublimed mass is treated with water, it in part 

 dissolves, calomel remaining undissolved, the solution is neutral, and on exami- 

 nation is found to contain sal ammoniac and sublimate. If this new white preci- 

 pitate be boiled in water there results the same yellow powder, which is produced 

 by boiling the genuine white precipitate ; but the sal ammoniac is formed in the 

 liquor in much larger quantity. 



The methods of analysis pursued were precisely the same as those described 

 in the memoir on white precipitate, and consequently it is unnecessary to repeat 

 the details of them here. The results of three analyses were : 



98.12 99.98 99.63 



These numbers lead directly to the formula ugd -{- sh^, which should give 

 sg = 101.40 65.86 



d = 35.42 23.01 



NH3 = 17.14 11.13 



153.96 100.00 



This body may therefore be looked on as consisting of an atom of sublimate 

 and one of ammonia. Now the result of passing ammonia over sublimate is to 

 generate a white substance, 2c^Hg-4-NH3, which is evidently a kind of double 

 chloride, iigd-\-iigAdH.cl, similar to many bodies already noticed in these 

 researches, as 



znd -{■ znAd.nd 

 CMSO4 4" cuA.d.nso^ 



This body is likewise of interest, as standing midway between sal ammoniac 

 and the real white precipitate, and serving to link bodies apparently so dissimilar 

 still more closely to the principles of the theory of the ammonia compounds 



VOL. XIX. N 



