(3) on charcoal. Gives off some sulphur, which burns with a blue flame. Residue fuses to a magnetic bead. (4) in forceps. -- (5) in borax. The roasted mineral gives a strong iron reaction. (6) in mic. salt. As in borax. (7) with carb. soda. Fuses to a black mass, which spreads out on charcoal and gives the sulphur reaction on silver. (8) Special reactions. -- * * * * * Mineral. Magnetic pyrites Formula. [,Fe]^{5}[,,,Fe=]. Behavior (1) in glass-bulb. -- (2) in open tube. Evolves sulphurous acid. (3) on charcoal. Fuses to a magnetic bead black on the surface, and with a yellow shining fracture. (4) in forceps. -- (5) in borax. As iron pyrites. (6) in mic. salt. As in borax. (7) with carb. soda. As iron pyrites. (8) Special reactions. -- * * * * * Mineral. Mispickel Formula. FeAs + FeS^{2}. Behavior (1) in glass-bulb. A red sublimate of AsS^{2} is first formed and then a black sublimate of metallic arsenic. (2) in open tube. Sulphurous and arsenious acids are evolved, the latter forming a white sublimate. (3) on charcoal. Gives off much arsenic forming a white incrustation and fuses to a magnetic globule. (4) in forceps. -- (5) in borax. As iron pyrites. (6) in mic. salt. As in borax. (7) with carb. soda. As iron pyrites. (8) Special reactions. -- * * * * * Mineral. Magnetic iron ore Formula. Fe^{3}O^{4} Behavior (1) in glass-bulb. -- (2) in open tube. -- (3) on charcoal. -- (4) in forceps. In the blue flame, fuses on edges and remains magnetic. (5) in borax. Gives the iron reaction. (6) in mic. salt. As in borax. (7) with carb. soda. -- (8) Special reactions. -- * * * * * Mineral. Specular iron Red haematite Formula. Fe^{2}O^{3} Behavior (1) in glass-bulb. -- (2) in open tube. -- (3) on charcoal. -- (4) in forceps. V. In the blue flame is converted into Fe^{2}O^{4}, and then behaves as the preceding. (5) in borax. As magnetic iron ore. (6) in mic. salt. As in borax. (7) with carb. soda. -- (8) Special reactions. -- * * * * * Mineral. Göthite Formula. [...Fe][.H]. Behavior (1) in glass-bulb. Evolves water. (2) in open tube. --