on the Ammonia-cobalt Bases, $29 
The formula 6NHs.Co2Cl: is given, by both Frémy and Ro- 
oe gojski, and no reasonable doubt can be entertained of its accu- 
rac density of the chlorid of Luteocobalt, as taken in 
ry. 
re is 1°7016 at 20° C., its atomic volume is consequently 
The reactions of the chlorid of Luteocobalt are as follows: 
odid of potassium gives a bright yellow precipitate. _ 
Bromid of potassium gives a less brilliant yellow precipitate. 
Ferrocyanid of potassium gives a chamois colored precipitate, 
which becomes black on boilin 
Be 
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oO 
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Chromate of potash gives a bright yellow precipitate of the 
4 chromate, 
___, Oxalate of ammonia gives a buff yellow precipitate, soluble 
M oxalic acid, 
Tribasie phosphate of soda gives, after a short time, a yellow 
Precipitate, ce 
3 Ytophosphate of soda gives a pale buff colored precipitate. 
Picrate of ammonia gives a beautiful yellow precipitate of 
very fine silky needles, 458 igh 
ime and their carbonates produce no precipitate in the 
_ Sulpbid of ammonium gives a black precipitate. 
CHLORPLATINATE OF LUTEOCOBALT. 
od i he 
Oran nular crystals may be couverted into t 
= w needles by pare in a large quantity of hot water and 
The crystals are eceaily hollow and much striated longi- 
+ The obse 
YoL. XXII, NO. 69.—MAY, 1857. 
