68 Qualitative Tests. 
With Cobalt Solution.—Strongly heated, becomes 
a pale-flesh color. -(With silicates this action is of use 
only in the absence of coloring oxides. The phosphate, 
arsenate, and borate become violet-red. ) 
IN THE WET WAY. 
1. NasHPO: precipitates, in presence of NH:OH 
. and N:HCl, white MgNH:PO. Fine crystals. 
Confirm.—By blowpipe. 
MANGANESE, Mn. 
WITH THE BLOWPIPE. 
With Borax or S. Ph.—O. F. Amethystine hot, red- 
dens on cooling. With much, is black and opaque. (‘The 
colors are more intense with borax than with 8. Ph.) 
If a hot bead is touched to a crystal of sodic nitrate an 
amethystine or rose-colored froth is formed. 
R. F. Colorless or with black spots. 
With Soda.—o. F. Bluish green and opaque when 
cold. Sodic nitrate assists the reaction. 
Interfering Elements. 
Chromium.—The soda bead in O. F. will be bright 
yellowish green instead of bluish green. 
Silicon.—Dissolve in borax, then make soda fusion. 
IN THE WET WAY. 
1. Boil with HNOs, and add peroxide of thd: A 
reddish-violet solution (color of potassium permangan- 
ate) indicates Mn. 
MERCURY, Hg. 
WITH THE BLOWPIPE. 
With Bismuth Flua:—On Plaster —Volatile yel- 
low and scarlet coat. If too strongly heated the coat is 
black and yellow. 
On Coal.—Faint-yellow coat at a distance. 
In Matrass, with Dry Soda or with Litharge.— 
Mirror-like sublimate, which may be collected in glo- 
