74 Dr. Kane on the Compounds of Ammonia. 



I sought very frequently to obtain sal ammoniac combined with water of 

 crystallization, in order to produce a parallel to the compound 



•agcl-\-'2.yigo-\-ugKd, 



but unsuccessfully. Yet if we consider the close relations of hydrogen and cop- 

 per, and of oxygen and amidogene, we will find in the bodies 



CMc/ -|- 2 CMO + HO 



cud -\- ^cuo -\- cuo 



cud -\- 2 CUO 4" HA6? 



similar cases, in the same way as quicksilver, gives 



vigd -\- 2 Hg-o + Hg-o ; 



and also the soluble ammonia chloride of copper, whether written 



cud -\- 2H\d ■\- HO, 

 or 



(hc/+ HArf) + (CMO.HArf), 



presents analogies fully supplying the place of hydrated sal ammoniac. 



To sal ammoniac itself the copper and zinc series affords numerous analogues. 

 Thus, the perfectly definite and well characterized bodies, 



1. cud-\-nkd. 



2. znc^-j- HArf. 



3. md -\- HArf. 



correspond to 



n.cl -\- HAC? ; 



whilst we find for the ordinary compound 



cud -J- (h.c/ + -akd) + 2 ho, 



the body 



znd -\- (znd -\- nKd) 



and also 



znd -\- {znd -\- hac?) + {no.Hkd), 

 or else 



zncl-\-iucl-\-HKd)-\-{zno.vLA.d). 



