300 Scientific Intelligence. 
consequence of its well-marked dichroism. Its formula is, in the 
old notation employed by Rose, Co,Cl, . 3NH ,+2H0, which 
may be written €o,Cl, .6NH,+20H,, so that it is probably the 
chloride of cobalt-hexamin. Erdmann has described a correspond- 
ing nitrite and Ktinzel a sulphite; both these salts probably be- 
long to the same series. Rose does not state whether the chloride 
unites with — chlorides to form salts. The light-green salt 
formed at the same time is identical with the salt discovered by 
Genth and Gibbs, and called by them ba era alt. The exist- 
4NH,+2H0 o 
o,Cl,.8NH,+20H,. It appears to be the chloride of the 
tetainn (octamin) series, the hyposulphate of wee oe se 
by Kiinzel and has the formula, Co,O 
. 8NH, 13: Rose does not state Jee the a cit 
soit bities or ‘not with metallic chlorides, nor whether it rat 
other salts by double. decomposition.— Untersuchungen 
berg 1871 Kobalt- Verbindungen von Dr. F. Rose. Hie 
erg, 187 w. 
4. On some new salts of roseo-cobalt and luteo-cobalt. "Koo 
has eget a number of interesting salts of roseo-cobalt and luteo- 
cobalt in the laboratory of Blomstrand. The iodosulphate of luteo- 
cobalt, a yellow salt slightly soluble in hot and nearly insoluble in 
cold water, has the formula €o,(NH S0,),. By evapor 
of luteo-cobalt. The corresponding chlorosulphate, €o,(NH,)12 
Cl,(S0,),+6 aq, five’ beautiful quadratic prisms, ra arely See 
psits "Orher salts of the same base have respectively the tor 
mulas, 
Cl, . 2HgC1 Cl, . PtCl, 
604(NH,),2 sé, . gCl2) €0(NH,) 24 ($80) 
©o,(NH)i24 G2 HS | €o,(NH).2 1 4, 
4 
The salts of roseo-cobalt obtained were: 
vi 
€o0,(NH,), ,1,(S0,J.4+2 aq 
€o0,(NH;,), oB .(50,).+2 aq 
€o0,(NH,),.(NO5), +2 aq 
€o,(NH,),, Se, - (SO,NH,)’s 
02( dros, }: +6aq 
eed 
€o(NH)(N'5 Soe 
€o,(NH,),,Cl. (N®.), +3 aq. 
ree ee ee ee ee ee ae 
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