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A heavy, brilliant red pigment, consisting of an oxide of lead, Pb3O4, obtained by exposing lead or massicot to a gentle and continued heat in the air. It is used as a cement, as a paint, and in the manufacture of flint glass. Called also red lead.

lightness, pertaining a specific gravity of about 2.6. Atomic weight 27.08. Symbol Al. Aluminium bronze or gold, a pale gold- colored alloy of aluminium and copper, used for journal bearings, etc.

The name given to a hypothetical element, -- later discovered and called gallium. See Gallium, and cf. Ekabor.

The return to his own country, and his former privileges, of a person who had gone to sojourn in a foreign country, or had been banished, or taken by an enemy. Burrill.

A double sulphate formed of aluminium and some other element (esp. an alkali metal) or of aluminium. It has twenty-four molecules of water of crystallization.

One of the earths, consisting of two parts of aluminium and three of oxygen, Al2O3.

A compound formed from the hydrate of aluminium by the substitution of a metal for the hydrogen.

Of or containing aluminium; as, aluminic phosphate.

Art or process of producing, and printing from, aluminium plates, after the manner of ordinary lithography. -- A*lu`mi*no*graph"ic (#), a.

See Aluminium.

An explosive consisting of a mixture of powdered aluminium and nitrate of ammonium.

gray, green, brown, and black. It is a silicate of magnesium and calcium, with usually aluminium and iron. Some common varieties are tremolite, actinolite, asbestus, edenite, hornblende (the last name being also used as a general term for the whole species). Amphibole is a constituent of many crystalline rocks, as syen…

A silicate of aluminium, occurring usually in thick rhombic prisms, nearly square, of a grayish or pale reddish tint. It was first discovered in Andalusia, Spain.

lated to orthoclase, but triclinic. It is chiefly a silicate of sodium, potassium, and aluminium. Sp. gr., 2.57 -- 2.60.

A (patented) alloy of aluminium and silver, with a density of about 2.9.

A ferruginous hydrate of alumina. It is largely used in the preparation of aluminium and alumina, and for the lining of furnaces which are exposed to intense heat.

f a green or bluish green color, but also yellow, pink, and white. It is a silicate of aluminium and glucinum (beryllium). The aquamarine is a transparent, sea-green variety used as a gem. The emerald is another variety highly prized in jewelry, and distinguished by its deep color, which is probably due to the presence…

Boldness; impudence; "brass." Imbrowned with native bronze, lo! Henley stands. Pope. Aluminium bronze. See under Aluminium. -- Bronze age, an age of the world which followed the stone age, and was characterized by the use of implements and ornaments of copper or bronze. -- Bronze powder, a metallic powder, used with…

An agent employed in catalysis, as platinum black, aluminium chloride, etc.

An impure aqueous solution of chloride of aluminium, used as an antiseptic and disinfectant.