| 
276 Principal Characters of the Earths, §c. 
ASSAY. WiTH OTHER REAGENTS. 
—— 
SUC atrad eo srererarweere’s 
fused 
Molybdic acid. .......- 
Tungstic acid. .....+.. 
Oxide of chrome....... 
Antimony ...-seeeeees 
Oxide of antimony... 
Antimonious acid,... 
Antimonic acid.....- 
Oxide of tellurium. .... 
Oxide of columbium ... 
Oxide of titanium. ....) N, C, black, or greyish-black 
Oxides of uranium ... 
Oxides of cerium 
Oxide of manganese. . 
Oxide of zinc. ....e0e- 
Oxide of cadmium. .... 
Oxide of iron......+++* 
Oxide of cobalt........| With subcarbonate of 
black glass when cold 
Oxide of nickel........ 
BSMUEh so <ejsloe:s o'tjeie 
Oxide of bismuth ..-+ 
Oxides of tin.....+++++ 
Oxide of lead. ... 
Oxide of copper. ..-++- 
Mercury... ..eesseceee 
seers 
Oxide of silver . +++: 
Gold. ....eeesseres 
Platings  oisice osisis,ece 
Tridium.....-ecee 
Rhodium. .....-.+++ 
Palladium ...... AO 
N. C.; blue glass when perfectly, 
before the Blowpipe. [Ocr. 
REMmanrks. 
The part not perfectly fused with 
nitrate of cobalt, has a reddish-blue 
disagreeable colour 
In the inclined glass tube, fuses, 
igives off vapour, which condenses 
partly on the tube as a white powder, 
partly on the assay in brilliant pale- 
yellow crystals 
If tungstic acid contain iron, the 
glass with salt of phosphorus is blood- 
red in R. F. Tin makes it green or 
blue. 
Antimony does not sublime at the 
fusing point of glass. On charcoal, 
when red, ignition continues sponta~ 
neously, In a tube open at both 
ends, it gives off white fumes 
The oxide and acids of antimony 
behave alike with the fluxes 
Metallic tellurium heated in a glass 
matrass, first gives off vapour, and 
then a grey metallic sublimate of tel- 
lurium. In a tube open at both 
ends, emits abundant fumes which 
condense in a white fustble powder 
For the rest of the phenomena, see 
the original work 
A very minute portion of manga- 
nese gives a green glass with soda 
The reduction of iron from the 
peroxide to protoxide is facilitated by 
tin 
potassa, 
In a glass matrass does not sublime 
at the fusing point of glass. 
open tube scarcely gives off any 
fumes; the metal becomes covered 
with a dull-brown fused oxide, of a 
slight yellowish tint, when cold 
All the compounds of mercury are 
volatile; mixed with tin or iron fil- 
ings, and heated in a glass tube, mee 
tallic mercury distils over 
( . These metals have no action on 
4 the fluxes, which can only serve to 
detect the foreign metals they may 
| be combined with. They are best — 
{examined by cupellation with lead 
In an © 
