36 



PROCEEDINGS OF THE AMERICAN ACADEMY 



Octamin salt, ^CooAj,Xj ICojA^X^^ = 2. Co.^A^Xg 



Xanthocobalt salt, ^Co^,A,„X^| ^ Co^A^Xg^.^ = 3. Cc\,A,.Xg 



Luteo salt «, j^'o^Aj.J ^Co^XjJ = 2. Co^AijXg 



Luteosaltp, iCojAj^nCoaA^XJg = 4. CojA^Xq 

 Erdmann's salt, 1. CogAyXg 



The salts of luteocobalt, the formulas of which may be considered as 

 well established, are as follows : — 



Cldoride, 



Iodide, 



Bromide, 



Nitrate, 



Sulphate, 



Chromate, 



Dichromate, 



Oxalate, 



Carbonate, 



Acid carbonate, 



Phosphate (Braun), 



Pyrophosphate, 



Cobalto-uitrite (Sadtler, 



Gibbs), 

 Amnionia-cobalt-nitrite, 

 Sul|)hato-chloride (Krok), 

 Sulphato-iodide (Krok), 

 Chromo-chloride (Braun), 

 Cobalticyanide,* 

 Ferrieyanide,* 

 Chroniicyanide (Braun), 

 Platino-chloride, 

 Auro-chloride, 

 StiUinoso-cldoride (Braun), 

 IIvlrar<ro-chloride (Krok), 

 riydrargo-cldoride (Carstan- 



S ul phato-hy drargo-chl oride 

 (Krok). 



Co,(NH3)i,Cle 



Co,(NH3),Jg 



Co,(NH,3)„3rg 



Co,(NH3),,(N03)g 



Co,(NH3),,(SO,)3+oOH2 



Co,(NH„),,(CrOj3+50H2 



Co^(N H3),.,(Cr.,0.),+50 rij 



Co;(NH3),,'(aO,)3+40H, 



Co,(NH3),,(CO,,)3+70H, 



Co.,(NH3)i.,(CO..)3+CH.,0,+50H2 



Co;(NH3);,(PO,),+80H,' 



Co,(NH3)i,.P,Oi34-60H2 



Co„(XIl3),2.Co.,(NO.O,., 



Co,(NIl3),,^Co,(Nll3),(NO,),U 



Co„(NIl3),.,(80,).,Cl.,4-GOH., 



Co^(NIl3),;(SOJj/ 



Co.,(NH,)io(CrOJ.,Cl„-|-10Oll3 



Co;(x\H3),;Cy«+Co,Cye 



Co.,(NnO,.,Cyo+Fe.,Cv6 



Co,(NH3),,Cy,+Cr,Cy« 



Cc/NFyisCl^+SPtCl.+GOHa 



Co,(NIL),Xl,,-i-2AuCl, 



Co2(XH,)„"ci,+;JSnC'i,4-SOII, 



Co,(NH3),;Cl,+2HgCi,4-30H, 



Co,(NIl3),,Cl,+4ngCl,+OIT, 



Co,(NIl3),,(SO,),Cl,+2IIgCl, 



* The analyses of tlie cobalticyanide ami forricyanide made by Gcnth and 

 myself correspond better with a formula containing one atom of water of crys- 

 tallization. 



