(3) on charcoal. Is volatilized. (4) in forceps. -- (5) in borax. -- (6) in mic. salt. -- (7) with carb. soda. -- (8) Special reactions. -- * * * * * Mineral. Cinnabar Formula. HgS. Behavior (1) in glass-bulb. Volatilizes sometimes leaving a slight earthy residue, and re-condenses as a black sulphide. (2) in open tube. If gently heated is decomposed into metallic mercury, which volatilizes and recondenses in the upper part of the tube, and SO^{2}, which passes off as is easily recognized by its odor and bleaching properties. (3) on charcoal. Is volatilized, generally leaving a small earthy residue. (4) in forceps. -- (5) in borax. -- (6) in mic. salt. -- (7) with carb. soda. With carbonate of soda and cyanide of potassium is decomposed and metallic mercury volatilized. (8) Special reactions. When in the preceding experiment the mercury has been entirely dissipated, the alkaline residue laid on silver gives a sulphur reaction. * * * * * Mineral. Native amalgam Formula. AgHg^{2}. Behavior (1) in glass-bulb. As native mercury, but leaves a residue of pure silver. (2) in open tube. -- (3) on charcoal. The mercury volatilizes leaving the silver, which fuses to a bead, and, in the oxidizing flame, incrusts the charcoal with its characteristic oxide. (4) in forceps. -- (5) in borax. -- (6) in mic. salt. -- (7) with carb. soda. -- (8) Special reactions. -- * * * * * SILVER. * * * * * Mineral. Native silver Formula. Ag. Behavior (1) in glass-bulb. -- (2) in open tube. -- (3) on charcoal. Fuses and in a strong oxidizing flame forms an incrustation of dark brown oxide on the charcoal. If any antimony be present, it affords a crimson incrustation. (4) in forceps. -- (5) in borax. Gives the silver reactions. (6) in mic. salt. As in borax. (7) with carb. soda. -- (8) Special reactions. -- * * * * * Mineral. Antimonial silver Formula. Ag^{2}Sb. Behavior (1) in glass-bulb. --