40 Dr. Kane on the Compounds of Ammonia. 



CMc/-|- 2cMO -|- 4ho. 

 compared with 



ca.c/ -j- 2 HO -|- 4 HO. 

 and 



Ugcl -|- 2 HO -J- 4 HO. 



I will have occasion to recur to these bodies when speaking of their analogues 

 among the compounds of zinc. 



The other new oxychloride of copper, in its dry condition, is analogous to 

 the chlorides which crystallize with four atoms of water, as iron and manganese. 



When this oxychloride, in a dry condition, is exposed to a current of ammo- 

 niacal gas, an absorption takes place, with the evolution of some heat; but 

 although the current may be continued long after the mass shall have become 

 cold, yet no alteration of colour occurs, the mass remaining brown. If the 

 ammonia be passed over the oxychloride in its hydrated condition, it becomes 

 blue, water is given out, and the whole is evidently decomposed ; and if the 

 brown mass be wetted, there is formed a hydrated ox;j^chloride and a blue liquor, 

 showing total decomposition. 



Dry ammonia, acting on dry oxychloride, gave the following results : 



I. 4.801 of oxychloride absorbed 0.504 ammonia, or 10.4 per cent. 



II. 3.970 of oxychloride absorbed 0.436 ammonia, or 11.1 per cent. 



These numbers give, for the proportion absorbed, almost exactly one equiva- 

 lent ; and the resulting brown mass has evidently the formula 



cud -j- 2cMO -j- NH3. 



According to which 100 should have absorbed 11.8 of ammoniacal gas. 



Now putting NH3 = ukd, the relation of this body with those last noticed 

 becomes very remarkable, as we must contemplate the series 



cud -\- 2CM0 -j- CMO 



cud -\- 2 cuo -\- HO 

 cud -\- 2cuo -\- nkd. 



in which cm and h, o and Arf mutually replace each other. 



