OP ARTS AND SCIENCES. 



11 



have been able to determine, sufficiently to be made available in analy- 

 sis, and probably isomorphous. Nitrate of luteocobalt gives fine orange 

 crystalline, slightly soluble precipitates with potassic oxyfluotungstate, 

 oxyfluomolybdate, and fluoborate. 



For convenience of reference I give here a list of the salts which, in 

 my judgment, belong to the purpureocobalt series, and which have 

 been more or less completely described. 



Chloride, 



Bromide (Claudet), 



Iodide (Claudet), 



Sulphate, 



Nitrate, 



Chloro-nitrate, 



Chloro-oxalate, 

 Pyrophosphate (Braun), 

 Chromate (Braun), 

 Dichromate, 

 Ammonia-cobalt-nitrite, 

 Cobalto-nitrite, 



Chloro-fluosilicate, 

 Platino-chloride, 

 Auro-chloride, 

 Antimonio-chloride, 

 Hydrargo-chloride a, 

 Hydrargo-chloride ^, 



NORMAL SERIES. 



Co,(NH3),,Cl, 

 Co,(NH3),„Br, 



C02(NH3)iJg 



Co,(NH3),„(SO,)3+OH, 



Co,(NH3),,(xX03)« 



Co,(NH3),„Cl3(N03)3+Co,(NH3),„ 



(N03)« 

 Co.,(NH3)j„(CA)..Cl, 

 Co,(NH3),,pA.3+210I1, 

 Co,(NH3),„(CrO,)3 

 Co.,(NH„),o(Cr„0.).,+OH2 

 |Co,(NH3),,nCo,(NH3),(NO,)j3 

 ^Co,(NH3),,(NO,)j3lCo,(NO,),J, 



+9 OH., 

 Co,(NH3),,(SiF,),CU 

 Co,(NH3),oC\+2PtCl, 

 Co.,(NH3)ioCle+2AuCl3 

 Co;(NH3XoCl«+SbCl3 

 Co,(NH3)„Cl,+4HgCl, 

 Co,(NH3),„Cl,+6HgCl, 



BASIC SERIES. 



Chromate, Co,(NH3),o.O.(CrO,),-}-60H2 



Hyposulphate (Rammelsberg), Co^(NH3)jQ.O.(S20g)2 

 Nitrate, Co2(NH3)io.O.(N08),+60H2 



Chloride ? (Schiff), Co,(NH3)io.O.Cl, 



Sulphate ? (SchifF), Co,'(NH,,)io-0-(SO,)o 



Tungstate, 



Co,(NH3),,.0.(WOJ, 



