Dr. Kane on the Compounds of Ammonia. 39 



It consequently follows, that the dry oxychloride is capable of uniting with 

 water in three different proportions ; thus, 



In pale green powder 100 oxychloride take 27-4 water. 

 In bright green do. 100 do. 20.2 



In brown do. 100 do. 6.9 



But 6.9, 20.2, and 27.4 are nearly as 1, 3, and 4. 



From C, D, and E it results, that the dry oxychloride has the composition 



Theory. Experiment. 



cl = 35.42 24.22 23.59 



3cw = 94.80 64.84 63.78 



2o = 16.00 10.94 10.77 



146.22 100.00 98.14 



From the proportion of water, it is evident that the dry oxychloride combines 

 with one, three, and four equivalents in the three different conditions in which 

 it exists, and that hence there are the formulas 



1. CUCl-\- 2 CMC. 



2. CMc/-|- 2cMo4-HO. 



3. cucl-\-2cuo-\-ZvLO. 



4. cmc/4"2cmo-1-4ho. 



The discovery of this body leads us to some very interesting relations, in this 

 class of substances ; thus, this one is evidently the simplest oxychloride, being 

 related to the crystallized hydrated chloride, as 



CMC^-|-2cMO to cmc^-j-2ho; 

 and the first atom of water being so strongly retained, points out the passage 

 through 



CMd-|-HO + 2CMO 



to 



cud + CMO -\- 2 CMC, 



the ordinary oxychloride deprived of water, but both combining with additional 

 quantities of water, and acquiring the brilliant green colour by which they are 

 respectively characterized; and the condition in which this salt retains most 

 water, gives to it a composition which brings to mind the crystallized hydrates of 

 many chlorides of the same class, as 



