On the Common Blowpipe. 323 
Reaction r the Principal aaa Owides, with the three Fluxes, 
e Blowpipe. 
he... SODA. BORAX. | OF PHOSPHORUS. 
Oxides 0 | ~Osiisinge ee ee pnp de Oridizing Reducing 
of | jiam Jlame. ; Jjiame. 
ge. C. n Yatiowish \H. Emera id { 
Chromium. Yellow. Inte gio & green. H.&C. Green. H. &C, Green. 
— — olotiess 0 +d ©, Colorless. | 
slightly gr | 
H. Yellow. H. &C. Opaque, 
Antimony - eg < Nearly color- | grayish, ictal Colorless. 
less. 
H. Dar [ied Ay oagmat tie Colorless. i. Yellow. H. Yellow. 
— — C. Opaque white. iC, Violet a ame- |Colorless. C. Beautiful 
thyst or blue. ( violet. 
ent 
Manganese. nereen Amethyst. \Colorless if sud-' Amethyst. Colorless. 
C. Bluish green. : denly cooled. | 
Cobalt. tain Blue. Blue. = Blue. 
H. Orange or red- i. Orange or |H. Orange or 
Nickel = inthe) dish. jOpague, gray- |_ reddish, poe 
: iC. Fh A siege or | ish. C. Colorless. ° Colorless 
H. Dark red. } HH. Dark red. 
Iron. — in the'G” Yellowish or [Bottle green ‘Bottle green. 
colorless. C. Colorless. | 
3 c H. Colorless, a & de- 
Zine. ye aax in the, transparen : posits a 8 ti with borax. 
nite, opaque. DoW rer on the . 
cha i 
i. Frieda ‘H. Yellow. 
Lead. parent. | Partly reduces. |Colorless. Does not re- 
Cc. “elowish ' Colorless. ‘duce,colorless. 
; H. Green,trans- H. Colorless. H. Colorless. 
arent. Treen. 
Copper. €. Coloriess, ‘Green. O-Cinnaber 'C. Cinnabar 
opaque red. | red. 
The mode of recognizing various other substances in minerals, by 
means of the blowpipe is given below. 
If a mineral containing water be heated ina matrass, the water 
will be expelled, and condensing upon the cool part of the tube will 
appear like dew. If the water was chemically combined, sore stri- 
king change in the appearance of the mineral will generally be ob- 
served, such as loss of transparency, change of color, &c. 
When sulphurets of the common metals, are heated in the open 
tube, the odor of sulphurous acid will be perceived at the upper 
orifice ; and a slip of paper stained with decoction of Brazil wood, 
if paced in the tube, will be turned yellow or bleached. 
If sulphates are melted with a glass of silica and soda, a sul- 
phuret of sodium is formed which communicates to the glass a char- 
acteristic brown color, like that of liver of. sulphur. 
