AMMONIA-COBALT BASES. 



67 



Chloraurate 

 Cobaltidcyanide 

 Sulphate 

 Nitrate 

 Oxalate 

 Carbonate . 

 Acid carbonate 

 Chromate 



Chloride 



Chlorplatinate 



Chloraurate 



Chlorhydrargyrate 



Ferrocyanide 



Sulphate 



Nitrate 



Oxalate 



6NH 3 .Co 2 .Cl 3 +AuCl 3 . 

 6NH7Co 2 Cy 3 +Co 2 Cy 3 +HO. 

 6NH7Co 2 .0 3 ,3S0 3 + 5HO. 

 6Nh7Co 2 .0 3 ,3N0 5 . 

 6NH£o 2 .0 3 ,3C 2 3 +4HO. 

 6NEQCo 2 .0 3 ,3C0 2 + 7HO. 

 6NlCCo 2 .0 3 ,3C0 2 +HO,C0 2 +5IIO. 

 6NH7Co 2 .0 3j 3Cr0 3 + 5HO. 



Xantliocobalt. 



. NCC5NIL 



. no75nh; 



. N0T5NHI 



. no75nil 



. N0^5NIL 



. NOr5NH' 



. no75nh; 



. NOT5NH' 



.Co 2 O.Cl 2 . 



.Co 2 O.Cl 2 +2PtCl 2 +2HO. 



rCo 2 O.Cl 2 +AuCl 3 +2HO. 



rCo 2 O.Cl 2 +4HgCl+2HO. 



rCo 2 O.Cy 2 +FeCy+7HO. 



?Co 2 0.0 2 ,2S0 3 +HO. 



?Co 2 0.0 2 ,2N0 5 +HO. 



?Co 2 0.0 2 ,2C 2 3 +5I10. 



In concluding 1 for the present an investigation to which we have devoted our 

 leisure for several years, and which has been one of extraordinary difficulty, we 

 desire to state our conviction that the subject is by no means exhausted, but that 

 on the contrary there is scarcely a single point which will not amply repay a more 

 extended study. The number of bases which the sesquioxide of cobalt is capable 

 of forming with ammonia is perhaps very large, and a careful study of the products 

 of the decomposition of the salts of each base promises to yield an abundant har- 

 vest of interesting combinations. It is our hope to be able to return to the subject 

 hereafter, and in a second part of our memoir to clear up some points which we 

 have not as yet had time and opportunity fully to consider. In the mean time, we 

 invite the attention of chemists to a class of salts which for beauty of form and 

 color, and for abstract theoretical interest, are almost unequalled either among 

 organic or inorganic compounds. 



1 I should do no justice to my own feelings if I did not in this place gratefully acknowledge the 

 assistance which I have received in the analytical part of the labor from my friend and pupil, Mr. 

 James R. Brant, whose zeal and skill have alone rendered it possible for me, amid the duties of a 

 laborious professorship, to bring my own share of the work to a conclusion. W. G. 



New York and Philadelphia, July, 1856. 



