(7) with carb. soda. Is reduced yielding a metallic bead and incrusting the charcoal with PbO. (8) Special reactions. Gives the chlorine reaction with microcosmic salt and CuO. Also the phosphoric acid reactions. * * * * * Mineral. Mimetene Formula. PbCl+ 3[.Pb]^{3}[.....As] Behavior (1) in glass-bulb. As the preceding. (2) in open tube. -- (3) on charcoal. Fuses, but less easily than the preceding, gives off AsO^{3} and incrusts the charcoal with PbCl. Finally is reduced to a metallic bead and forms an incrustation of PbO. (4) in forceps. As the preceding. (5) in borax. The oxide formed on charcoal gives the lead reactions. (6) in mic. salt. As in borax. (7) with carb. soda. As the preceding. (8) Special reactions. Gives the chlorine reaction. * * * * * Mineral. Vanadinite Formula. PbCl + 3[.Pb]^{3}[...V]? Behavior (1) in glass-bulb. As pyromorphite. (2) in open tube. -- (3) on charcoal. The powdered mineral fuses fuses to a black shining mass, which in the reducing flame affords a metallic bead. Incrusts the charcoal first with a white film of PbCl and afterwards with PbO. (4) in forceps. As pyromorphite. (5) in borax. Dissolves readily to a clear glass, which, in the oxidizing flame, is yellow, while hot, and colorless when cold. In reducing flame becomes opaque, and on cooling green. (6) in mic. salt. In oxidizing flame is yellow while hot, becoming paler on cooling. In reducing flame brown while warm, and emerald green when cold. (7) with carb. soda. On platinum wire fuses to a yellow bead, which is crystalline on cooling. On charcoal yields a button of metallic lead. (8) Special reactions. With microcosmic salt and CuO, gives the chlorine reaction. If fused in a platinum spoon with from 3 to 4 times its volume of [.K],[...S]^{2} it forms a fluid yellow mass having an orange color when cold. * * * * * Mineral. Crocoisite Formula. [.Pb][...Cr]. Behavior (1) in glass-bulb. Decrepitates violently and assumes a dark color. (2) in open tube. --