On the Common Blowpipe. 



323 



Reaction of the Principal Metallic Oxides, with the three Fluxes, 

 by the Blowpipe. 



SALT OF PHOSPHORUS. 



Oxides of 

 Chromium. . 



Antimony. 

 Titanium. . 



Manganese. . 

 Cobalt. ! 



Nickel. 



Iron. ■! 



Zinc. 



Lead. 

 Copper. 



j H. Orange. C, 

 ) Yellow. In re- 

 i ducing flame. 

 t Green. 



) H. Colorless. 

 )C. Wliite. 



H. Dark yellow. 

 C. White or 

 ' grayish. 



'H. Transpai-ent 



green. 

 ' C. Bluish green. 



, H. Red. 

 I C. Gray. 



Insoluble in the 

 flux. 



I Insoluble in the 

 ( flux. 



I Oxidizing 



H. Yellowish 

 ■{ brown. 

 'C. Colorless or 

 slightly green. 



jH. Yellow. .. 

 C, Nearly color- 

 less. 



■H. Colorless. 

 C. Opaque white. 



) Insoluble in the 

 ) flux. 



C H. Colorless, 

 3 transparent. 

 i C. Yellowish, 

 K. opaque. 



C II. Green,trans- 

 j parent. 

 i C. Colorless, 

 I. opaque. 



Amethyst. 



Blue. 



H. Orange or red- 

 dish. 



C Yellowish or 

 colorless. 



H. Dark red. 

 C. Yellowish or 

 colorless. 



H. Colorless, 

 transpai-ent. 

 C. White, opaque. 



H. Yellow. 



C. Colorless. 



Green. 



I Reducing 

 fianie. 



H. Emerald 



green. 

 C. Colorless. 



H. &C. Opaque. 

 ) grayish. 



H. Yellow. 

 C. Violet ame- 

 thyst or blue. 



Colorless if sud- 

 denly cooled. 



Opaque, gray- 

 ish. 



Bottle green. 



Sublimes, «fe de- 

 posits a white 

 powder on the 

 charcoal. 



Partly reduces. 



H. Colorless. 



C. Cinnabar 

 red. 



Oxidizing 

 Jlame. 



Reducing 

 flame. 



H.&C. Green. H.&C. Green. 



Colorless. 



Colorless. 



Amethyst. 



Blue. , 



H. Orange or 



reddish. 

 C. Colorless. 



H. Dark red. 

 C. Colorless. 



Colorless. 



H. Yellow. 

 C. Beautiful 



violet. 



Colorless. 



Blue. 



H. Orange or 



reddish. 

 C. Colorless. 



Bottle green. 



Same actions as with borax. 



Colorless. 



Green. 



Does not re- 

 duce.colorless. 



H. Colorless. 



C. Cinnabar 

 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 in a 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, some stri- 

 king change in the appearance of the mineral will generally be ob- 

 served, such as loss of transparency, change of color, Sic 



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 placed 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. 



