Dr. Kane on the Compounds of Ammonia. S9 



ammoniacal compounds of copper, applying with equal force to those of zinc, I 

 will not repeat it, but arrange the results just now described, in accordance 

 with those views. 



1. The crystalline salt = (NH3 , ho) SO3 + zno . (NH3 . ho) + 2 ho. 



2. The effloresced crystals = (nHj . ho) SO3 + zwo (nHj . ho). 



3. The effloresced powder = (NH3 . ho) SO3+ z«o . NH3. 



4. The flakey substance = (NH3 . zno) . SO3+ ho. 



5. The fused mass from 3 =: (nHj . zno) .so. 



I will not enter into the consideration of any of the interesting relations 

 which the arrangement of this series of bodies must suggest, except to point out 

 in the ordinary sulphate of ammonia, the anomaly of the crystallization of which, 

 with an atom of water, is so curious, the analogue of the bodies 4 and 5. Thus 

 there is 



(NH3H0.) sOg + HO and (nh3.ho)s03 

 as there is 



(NH3 . zno) SO3 -\- ho and (NH3 zno) SO3. 



When discussing the theory of these bodies in another section, I shall have 

 occasion to recur to these results. 



XI. OF A NEW BASIC SULPHATE OF ZINC. 



When the bodies (4) or (5) are treated by water they are decomposed, the 

 body (1) dissolves, a quantity of sulphate of ammonia is likewise formed, and the 

 insoluble matter is so definite and marked in its composition, that it must be 

 regarded as a new basic sulphate of zinc. It is white, insoluble in water, when 

 heated it gives water, and leaves a white powder behind. It was analyzed as follows : 

 2.594 grammes, dried by a spirit-lamp, gave 1.950, or 75.18 per cent., having 

 lost 24.82 water. 



The residual sub-sulphate was boiled with solution of carbonate of soda, and 

 the carbonate of zinc collected on a filter, dried, and ignited ; the oxide of zinc 

 remaining weighed 1.635, or 64.22 per cent. Hence the composition 



Sulphuric acid = 10.96 



Oxide of zinc = 64.22 



Water = 24.82 



I 2 



