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mber is very useful. See Eucalyptus. -- Blue jack, Blue stone, blue vitriol; sulphate of copper. -- Blue jacket, a man-of war's man; a sailor wearing a naval uniform. -- Blue jaundice. See under Jaundice. -- Blue laws, a name first used in the eighteenth century to describe certain supposititious laws of extreme ri…

A valuable ore of copper, containing copper, iron, and sulphur; -- also called purple copper ore (or erubescite), in allusion to the colors shown upon the slightly tarnished surface.

To impregnate with a preservative solution of copper sulphate, as timber, railroad ties, etc.

shaped like cogwheels (wheel ore), also massive. It is a sulphide of antimony, lead, and copper.

An alloy (usually yellow) of copper and zinc, in variable proportion, but often containing two parts of copper to one part of zinc. It sometimes contains tin, and rarely other metals.

To solder with hard solder, esp. with an alloy of copper and zinc; as, to braze the seams of a copper pipe.

A white-metal alloy of tin, antimony, bismuth, copper, etc. It somewhat resembles silver, and isused for table ware. Called also Britannia metal.

A basic sulphate of copper, occurring in emerald-green crystals.

An alloy of copper and tin, to which small proportions of other metals, especially zinc, are sometimes added. It is hard and sonorous, and is used for statues, bells, cannon, etc., the proportions of the ingredients being varied to suit the particular purposes. The varieties containing the higher proportions of tin are…

A hard tough alloy of tin, copper, and iron, which can be used for guns.

Heavy waste in tin and copper ores. To sit on brood, to ponder. [Poetic] Shak.

An oxychloride of copper, used as a green pigment; also, a carbonate of copper similarly employed.

ed the lord mayor of London in his inaugural procession. -- Budge barrel (Mil.), a small copper-hooped barrel with only one head, the other end being closed by a piece of leather, which is drawn together with strings like a purse. It is used for carrying powder from the magazine to the battery, in siege or seacoast se…

A copper instrument of the horn quality of tone, shorter and more conical that the trumpet, sometimes keyed; formerly much used in military bands, very rarely in the orchestra; now superseded by the cornet; -- called also the Kent bugle.

Showy metallic ornament, as of gold, silver, or copper, on bridles, saddles, etc. [Obs.] The clasps and bullions were worth a thousand pound. Skelton.

To combine energetically, with evolution of heat; as, copper burns in chlorine.

gh neck left on a bullet in casting. The graver, in plowing furrows in the surface of the copper, raises corresponding ridges or burrs. Tomlinson.

A piece of copper, screwed into a gun, through which the venthole is bored. Farrow.

A rope of steel wire, or copper wire, usually covered with some protecting, or insulating substance; as, the cable of a suspension bridge; a telegraphic cable.

A large kettle or boiler of copper, brass, or iron. [Written also cauldron.] "Caldrons of boiling oil." Prescott.