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highest available laboratory temperatures (Lockyer); as protocalcium, protochromium, protocopper, protonickel, protosilicon, protostrontium, prototitanium, protovanadium. -- Pro`to*me*tal"ic (#), a.

anides of ferrous and ferric iron; specifically, a dark blue amorphous substance having a coppery luster, obtained by adding a solution of potassium ferrocyanide (yellow prussiate of potash) to a ferric salt. It is used in dyeing, in ink, etc. Called also Williamson's blue, insoluble Prussian blue, Berlin blue, etc. -…

yden. Purple bird (Zoöl.), the European purple gallinule. See under Gallinule. -- Purple copper ore. (Min.) See Bornite. -- Purple grackle (Zoöl.), the crow blackbird. See under Crow. -- Purple martin. See under Martin. -- Purple sandpiper. See under Sandpiper. -- Purple shell. See Ianthina.

A name given to a number of metallic minerals, sulphides of iron, copper, cobalt, nickel, and tin, of a white or yellowish color.

of empyreumatic oil produced by the combustion of textures of hemp, linen, or cotton in a copper vessel, -- formerly used as a remedial agent. Dunglison.

d consisting essentially of tin with a slight admixture of antimony, bismuth, and lead or copper. -- Queen's pigeon. (Zoöl.) Same as Queen pigeon, above. -- Queen's ware, glazed English earthenware of a cream color. -- Queen's yellow (Old Chem.), a heavy yellow powder consisting of a basic mercuric sulphate; -- form…

cloth by pressure between revolving rollers. (b) A printing press with a roller, used in copperplate printing. -- Rolling stock, or Rolling plant, the locomotives and vehicles of a railway. -- Rolling tackle (Naut.), tackle used to steady the yards when the ship rolls heavily. R. H. Dana, Jr.

A stirrer in a copper for boiling wort.

A copper washer upon which the end of a nail is clinched in boat building.

A piece of gold money; -- probably because the gold of coins was often reddened by copper alloy. Called also red ruddock, and golden ruddock. [Obs.] Great pieces of gold . . . red ruddocks. Florio.

d salt. (b) A salt, whatever its constitution, which merely gives an acid reaction; thus, copper sulphate, which is composed of a strong acid united with a weak base, is an acid salt in this sense, though theoretically it is a neutral salt. -- Alkaline salt (Chem.), a salt which gives an alkaline reaction, as sodium c…

prepared from calcined lapis lazuli; ultramarine; also, a blue prepared from carbonate of copper. [Written also sanders-blue.]

A yellowish alloy of copper and zinc. See Simplor.

An alloy of copper, invented by the Japanese, having a very dark blue color approaching black.

which protects, as thin boards, sheets of metal, and the like; as, to sheathe a ship with copper.

The casing or covering of a ship's bottom and sides; the materials for such covering; as, copper sheathing.

A broad, thinly expanded portion of metal or other substance; as, a sheet of copper, of glass, or the like; a plate; a leaf.

An engraved copper roller used in print works.

An alloy of copper and zinc, resembling brass, but of a golden color. Ure.

A small vessel of iron, copper, or other metal, with a handle, used for culinary purpose, as for stewing meat.