972. ay Principal Characters of the Earths and [Ocr. 
NATL HEATED ALONE ON 
AssAY j 
Pratina, ''% CHARCOAL. 
ZAXCONIA. «2 2,000,006 2 ...-| Infusible: emits intense light Infusible ; emits intense light 
Sick inc aeqep- oversea No change No change 
Molybdic acid .......-| F. fumes and fuses; brown-yellow} Fuses, and is absorbed, and partly 
on cooling ; in R. F, blue; intense|reduced 
heat, brown 
Tungstic acid .........| R. F. blackens, but not reduced The same 
Oxide of chrome. ...... No change _The same 
Antimony ...-...--+.- Fuses readily ; white fumes, which 
condense into pearly crystals } 
Oxide of antimony ..| Fuses readily, and sublimes, in| Fuses readily, and reduces: co- 
white fumes; precipitated owide,|lours the flame greenish 
burns like tinder into antimonious' 
acid 
Antimonious acid ... Does not fuse, nor reduce; gives 
a bright light 
Antimonic acid ..... Whitens ; is changed to antimo- 
nious acid 
Oxide of tellurium..... F. fuses and fumes Fuses, efferyesces, and reduces 
Oxide of columbium. ..} No change The same 
Oxide of titanium. ..... No change The same 
Oxides of uranium.....- Peroxide becomes  protoxide $ 
blackens, but does not fuse 
Oxides of cerium......| Protoxide becomes peroxide Peroxide does not alter 
Oxide of manganese... . Not fused; becomes brown in 2 
strong heat 
Oxide of zinc. ......-.| Yellow while hot; white when 
cold; does not fuse, but gives out 
great light when very hot, and white 
fumes, which condense like wool 
Oxide of cadmium.....| F. no change Soon dissipates; leaves a red or 
orange-yellow powder on the char- 
coal 
y) 
Oxide of iron..........| O.F. no change R. F. blackens and becomes mag- 
netic 
Oxide of cobalt. ......| No change The same 
Oxide of nickel...... ..| No change The same 
Biamuth, . .Jsisiss sts Flies off in fumes, and leaves 2 
ace mark with red, or orange edges, 
which may be dissipated in R. F. 
without giving colour to the flame __ 
Oxide of bismuth... F. fuses readily, mass dark-brown,| Instantly reduced 
yellowish on cooling. In very intense 
heat reduces, and perforates the foil 
Oxides of tin........-. Protoxide takes fire, and burns| R. F. peroxide does not fuse, but 
like tinder into peroxide reduces in a strong prolonged heat 
Oxide of lead.........| Minium becomes black while hot;}/ Orange glass reduces into a glo- 
at incipient redness, changes to yel-|bule of lead 4 
low oxide, fusible into orange-colour- 
ed glass. 
Oxide of copper. ...... O. F. black globule; flows over 
the charcoal; under surface reduces 
R. F. reduces; with strong heat 
gives a bead of metal . 
Mercury........ seen ae ‘ 
Oxide of silver ...,....| Instantly reduced Instantly reduced 
UNL: oyoWcccere nat 
Platina ten aekns= sens 
Rhoda: (ous cece vvews 
Palladium .......... 55 
a 
