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A kind of gun metal, containing copper, zinc, and iron, but no tin.

d of metals fused together; a mixture of metals; for example, brass, which is an alloy of copper and zinc. But when mercury is one of the metals, the compound is called an amalgam.

t 27.08. Symbol Al. Aluminium bronze or gold, a pale gold- colored alloy of aluminium and copper, used for journal bearings, etc.

An alloy of nicked with copper and zinc; German silver.

A Roman copper coin, originally of a pound weight (12 oz.); but reduced, after the first Punic war, to two ounces; in the second Punic war, to one ounce; and afterwards to half an ounce.

An oxychloride of copper, usually in emerald-green prismatic crystals.

Like ink; suitable for making ink. Sulphate of iron (copperas, green vitriol) is called atramentarious, as being used in making ink.

A hydrous carbonate of copper and zinc, found in pale green or blue crystalline aggregations. It yields a kind of brass on reduction.

on gelatin are impressed into a soft metal plate, from which the printing is done as from copperplate.

Blue carbonate of copper; blue malachite.

A soft white alloy of variable composition (as a nine parts of tin to one of copper, or of fifty parts of tin to five of antimony and one of copper) used in bearings to diminish friction.

c. Hop back, Jack back, the cistern which receives the infusion of malt and hops from the copper. -- Wash back, a vat in which distillers ferment the wort to form wash. -- Water back, a cistern to hold a supply of water; esp. a small cistern at the back of a stove, or a group of pipes set in the fire box of a stove o…

Impure soda obtained from the ashes of any seashore plant, or kelp. Ure. Copper barilla (Min.), native copper in granular form mixed with sand, an ore brought from Bolivia; -- called also Barilla de cobre.

s. -- Bath metal, an alloy consisting of four and a half ounces of zinc and one pound of copper. -- Bath note, a folded writing paper, 8 1/2 by 14 inches. -- Bath stone, a species of limestone (oölite) found near Bath, used for building.

A small copper coin, with a mixture of silver, formerly current in some parts of Germany and Switzerland. It was worth about four cents.

A hard alloy or bronze, consisting usually of about three parts of copper to one of tin; -- used for making bells. Bell metal ore, a sulphide of tin, copper, and iron; the mineral stannite.

A pale blue pigment, prepared from the native blue carbonate of copper, or from smalt; -- called also blue bice. Green bice is prepared from the blue, by adding yellow orpiment, or by grinding down the green carbonate of copper. Cooley. Brande & C.

An alloy of gold and silver with a large proportion of copper or other base metal, used in coinage.

ed by calcining ivory or bones. When ground it is the chief ingredient of the ink used in copperplate printing. -- Berlin black. See under Berlin.

The name of a kind of in used in copperplate printing, prepared from the charred husks of the grape, and residue of the wine press.