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A mineral of a nearly silver-white color, composed of arsenic, sulphur, and cobalt.

llic luster, occurring in small orthorhombic crystals, also massive. It contains sulphur, arsenic, copper, and often silver.

sticky paper for killing flies that feed upon or are entangled by it. -- Fly powder, an arsenical powder used to poison flies. -- Fly press, a screw press for punching, embossing, etc., operated by hand and having a heavy fly. -- Fly rail, a bracket which turns out to support the hinged leaf of a table. -- Fly rod…

a metallic luster, consisting of sulphur, antimony, and lead, with a small proportion of arsenic.

ineral having a grayish tin-white color, and containing cobalt and iron, with sulphur and arsenic.

f a color between white and steel-gray, with a metallic luster, and consisting chiefly of arsenic and iron.

Arsenical iron pyrites; arsenopyrite.

Iron pyrites, or arsenical pyrites; -- so called by the Cornish miners.

, and is hard, malleable, and ductile. It occurs combined with sulphur in millerite, with arsenic in the mineral niccolite, and with arsenic and sulphur in nickel glance. Symbol Ni. Atomic weight 58.6.

d, as iron, lead, etc. Usually the ores contain the metals combined with oxygen, sulphur, arsenic, etc. (called mineralizers).

Arsenic sesquisulphide, produced artificially as an amorphous lemonyellow powder, and occurring naturally as a yellow crystalline mineral; -- formerly called auripigment. It is used in king's yellow, in white Indian fire, and in certain technical processes, as indigo printing. Our orpiment and sublimed mercurie. Chauce…

ng twenty-four grains, or the twentieth part of an ounce; as, a pennyweight of gold or of arsenic. It was anciently the weight of a silver penny, whence the name.

on-black ore of silver, consisting of silver, sulphur, and antimony, with some copper and arsenic.

A sulphide of arsenic and silver of a beautiful cochineal-red color, occurring in rhombohedral crystals, and also massive; ruby silver.

A salt of pyroarsenic acid.

Rat poison; white arsenic.

Arsenic sulphide, a mineral of a brilliant red color; red orpiment. It is also an artificial product.

A mixtire of caustic lime and orpiment, or tersulphide of arsenic, -- used in the depilation of hides. Knight.

ing birds of the genus Clytolæma. The males have a ruby-colored throat or breast. Ruby of arsenic, Ruby of sulphur (Chem.), a glassy substance of a red color and a variable composition, but always consisting chiefly of the disulphide of arsenic; -- called also ruby sulphur. -- Ruby of zinc (Min.), zinc sulphide; the m…

Realgar; red sulphide of arsenic. [Archaic]