A System of Instruction in the Practical Use of the Blowpipe Part 54

(6) in mic. salt. As in borax.

(7) with carb. soda. As the preceding.

(8) Special reactions. As native antimony.

Mineral. White antimony

Formula. SbO^{3}.

Behavior

(1) in gla.s.s-bulb. Is sublimed and recondensed in the neck of the tube.

(2) in open tube. As in the gla.s.s-bulb.

(3) on charcoal. Fuses with the evolution of dense white fumes, which incrust the surface of the charcoal. In the reducing flame is partly reduced, yielding metallic antimony. Colors flame blue.

(4) in forceps. Fuses and is volatilized, coloring the outer flame blue.

(5) in borax. Gives the antimony reaction.

(6) in mic. salt. As in borax.

(7) with carb. soda. In the reducing flame is reduced, yielding metallic antimony.

(8) Special reactions. As native antimony.

a.r.s.eNIC.

Mineral. Native a.r.s.enic

Formula. As.

Behavior

(1) in gla.s.s-bulb. Sublimes without fusion and recondenses as a dark grey metallic sublimate, sometimes leaving a small residue.

(2) in open tube. If gently heated in a good current of air pa.s.ses off as AsO^{3}, which is partly condensed as a white sublimate in the upper part of the tube.

(3) on charcoal. Pa.s.ses off as AsO^{3}, which thinly incrusts the charcoal beyond the a.s.say.

(4) in forceps. Colors the flame blue.

(5) in borax. --

(6) in mic. salt. --

(7) with carb. soda. --

(8) Special reactions. --

Mineral. Realgar

Formula. a.s.s^{2}.

Behavior

(1) in gla.s.s-bulb. Fuses, enters into ebullition and is sublimed as a transparent red sublimate.

(2) in open tube. Gently heated pa.s.ses off as SO^{2} and AsO^{3}, the latter of which is redeposited in the upper part of the tube.

(3) on charcoal. Fuses and pa.s.ses off as a.r.s.enious and sulphurous acids.

(4) in forceps. Fuses and colors the flame blue.

(5) in borax. --

(6) in mic. salt. --

(7) with carb. soda. As on charcoal, except that the S combines with the alkali forming NaS, which on silver gives the sulphur reaction.

(8) Special reactions. --

Mineral. Orpiment

Formula. a.s.s^{3}.

Behavior

(1) in gla.s.s-bulb. As the preceding, except that the sublimate is of a dark yellow color when cold.

(2) in open tube. As the preceding.

(3) on charcoal. As the preceding.

(4) in forceps. As the preceding.