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Sulphide of silver; -- also called vitreous silver, or silver glance. It has a metallic luster, a lead-gray color, and is sectile like lead.

Covered with defensive plates of metal, as a ship of war; steel-clad. This day will be launched . . . the first armor-plated steam frigate in the possession of Great Britain. Times (Dec. 29, 1860).

One of the elements, a solid substance resembling a metal in its physical properties, but in its chemical relations ranking with the nonmetals. It is of a steel-gray color and brilliant luster, though usually dull from tarnish. It is very brittle, and sublimes at 356º Fahrenheit. It is sometimes found native, but usual…

A compound of arsenic with a metal, or positive element or radical; -- formerly called arseniuret.

A mineral of a tin-white color and metallic luster, containing arsenic, sulphur, and iron; -- also called arsenical pyrites and mispickel.

xperiment; to get to know; as, to ascertain the weight of a commodity, or the purity of a metal. He was there only for the purpose of ascertaining whether a descent on England was practicable. Macaulay.

The act or process of ascertaining the proportion of a particular metal in an ore or alloy; especially, the determination of the proportion of gold or silver in bullion or coin.

n of 2000 avoirdupois pounds does to the troy ounce, the weight in milligrams of precious metal obtained from an assay ton of ore gives directly the number of ounces to the ton.

One who assays. Specifically: One who examines metallic ores or compounds, for the purpose of determining the amount of any particular metal in the same, especially of gold or silver.

The act or process of testing, esp. of analyzing or examining metals and ores, to determine the proportion of pure metal.

The trichloride of gold combination with the chloride of another metal, forming a double chloride; -- called also chloraurate.

A double cyanide of gold and some other metal or radical; -- called also cyanaurate.

ossification. Owen. Autogenous soldering, the junction by fusion of the joining edges of metals without the intervention of solder.

mbling "nature printing," by which drawings executed on gelatin are impressed into a soft metal plate, from which the printing is done as from copperplate.

The first principle of metals, i. e., mercury, which was formerly supposed to exist in all metals, and to be extractable from them.

To line with Babbitt metal.

A saw (as a tenon saw) whose blade is stiffened by an added metallic back.

s food, by cooking in a dry heat, either in an oven or under coals, or on heated stone or metal; as, to bake bread, meat, apples.

, a mechanical device for lessening the friction of axle bearings by means of small loose metal balls. -- Ball cartridge, a cartridge containing a ball, as distinguished from a blank cartridge, containing only powder. -- Ball cock, a faucet or valve which is opened or closed by the fall or rise of a ball floating in…

A piece of wood, metal, or other material, long in proportion to its breadth or thickness, used as a lever and for various other purposes, but especially for a hindrance, obstruction, or fastening; as, the bars of a fence or gate; the bar of a door. Thou shalt make bars of shittim wood. Ex. xxvi. 26.…