Dr. Kane on the Compounds of Ammonia. 



37 



were dissolved in nitric acid, and precipitated by nitrate of silver. The chloride 

 of silver produced v?eighed 0.964, or 50.71 per cent, for the green powder, and 

 containing 12.51 of chlorine. 



B. 2.678 grammes, dried over the spirit-lamp, gave, of brown powder, 2.143 

 or 80.02 per cent., which was boiled in a strong solution of caustic potash, and 

 the oxide of copper washed, until the liquors were perfectly free from traces of 

 free alkali; there was obtained 1.891 of oxide of copper, or 70.61 in 100 of 

 green powder, and containing 56.31 of metal. 



Hence the formula cucl-^ AiCUo-\-6ii.o results, which gives 



= 6.CWC/.NH3-|-4.HO. 



279.42 100.00 



cud -f- 4 cuo 

 4c/h-|-4nh3 

 cwc^ + 2nh3 

 The coincidence is quite satisfactory. 



This oxychloride differs therefore from that analyzed by Berzelius, in con- 

 taining, to the same quantity of chloride of copper, one atom more of oxide of 

 copper, and two more of water. The relation between this and the ordinary 

 oxychloride, can be very well shown, by arranging the formulae of the two in the 

 following manner : 



Common oxychloride =z cud. cuo + 2(cuo + 2 ho) 

 New oxychloride = cud. cuo + 3(cmo -j- 2 ho) 



V. OF A SECOND NEW BASIC CHLORIDE OF COPPER. 



Having prepared, during the course of these researches, a great number of 

 specimens of Brunswick green, I remarked that some, which had been produced 

 by a less perfect precipitation by the alkali employed, were of a much less brilliant 



