(6) in mic. salt. As in borax, but the reduction of the nickel is more difficult than in the latter flux. (7) with carb. soda. As glance cobalt. (8) Special reactions. As copper nickel, but the amount of arsenic is usually very small. * * * * * Mineral. Emerald nickel Formula. [.Ni]^{3}[..C] + 6[.H]. Behavior (1) in glass-bulb. Gives off much water and turns black. (2) in open tube. -- (3) on charcoal. -- (4) in forceps. -- (5) in borax. Dissolves with much effervescence and gives the nickel reaction. (6) in mic. salt. As in borax. (7) with carb. soda. Forms a slaggy mass. (8) Special reactions. In warm dilute HCl dissolves with much effervescence. * * * * * Mineral. Cobalt Bloom Formula. [.Co]^{3}[.....As] + 8[.H]. Behavior (1) in glass-bulb. Gives off water. (2) in open tube. -- (3) on charcoal. Evolves arsenical fumes and in the reducing flame fuses to a dark grey bead of arsenide of cobalt. (4) in forceps. In the point of the blue flame fuses and colors the outer flame blue (As). (5) in borax. Gives the cobalt reaction. (6) in mic. salt. As in borax. (7) with carb. soda. -- (8) Special reactions. Gives off arsenic with cyanide of potassium in glass tube. * * * * * Mineral. Earthy cobalt Formula. [.Mn],[.Co],[.Cu],[.Fe],[.H], etc. Behavior (1) in glass-bulb. Gives off water. (2) in open tube. -- (3) on charcoal. Emits a slight smell of arsenic, but does not fuse. (4) in forceps. Colors the flame blue. (5) in borax. In oxidizing flame gives the cobalt reaction which obscures those of [.Mn], [.Cu], etc. In reducing flame occasionally gives the [.Cu] reaction. (6) in mic. salt. As in borax. If a saturated bead be treated on charcoal with tin in the reducing flame for a few seconds, the [.Cu] reaction is sometimes obtained. (7) with carb. soda. Forms an infusible mass. (8) Special reactions. With carbonate of soda and nitre on platinum foil, gives a strong manganese reaction. * * * * * ZINC. * * * * * Mineral. Zincblende Formula. ZnS. Behavior (1) in glass-bulb. Decrepitates strongly.