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A rare metallic element of the aluminium group found in some minerals, as certain pyrites, and also in the lead-chamber deposit in the manufacture of sulphuric acid. It is isolated as a heavy, soft, bluish white metal, easily oxidized in moist air, but preserved by keeping under water. Symbol Tl. Atomic weight 203.7.…

A union of two conductors, as bars or wires of dissimilar metals joined at their extremities, for producing a thermoelectric current.

and degrees of heat. It is composed of alternate bars of antimony and bismuth, or any two metals having different capacities for the conduction of heat, connected with an astatic galvanometer, which is very sensibly affected by the electric current induced in the system of bars when exposed even to the feeblest degrees…

A self-acting apparatus for regulating temperature by the unequal expansion of different metals, liquids, or gases by heat, as in opening or closing the damper of a stove, or the like, as the heat becomes greater or less than is desired.

to protect the finger when pushing the needle through the material. It is usually made of metal, and has upon the outer surface numerous small pits to catch the head of the needle.

Having little thickness or extent from one surface to its opposite; as, a thin plate of metal; thin paper; a thin board; a thin covering.

A red or violet dyestuff having a greenish metallic luster. It is produced artificially, by the chemical dehydration of thionine, as a brown amorphous powder.

A wooden or metal pin, set in the gunwale of a boat, to serve as a fulcrum for the oar in rowing. Longfellow.

ess of electric welding in which heat is developed by a large current passing through the metal.

A metallic element found in certain rare minerals, as thorite, pyrochlore, monazite, etc., and isolated as an infusible gray metallic powder which burns in the air and forms thoria; -- formerly called also thorinum. Symbol Th. Atomic weight 232.0.

Metal still in the mine. [Obs.]

A rare metallic element of uncertain properties and identity, said to have been found in the mineral gadolinite.

A censer of metal, for burning incense, having various forms, held in the hand or suspended by chains; -- used especially at mass, vespers, and other solemn services. Fairholt.

A plate of metal used for roofing.

A lever of wood or metal fitted to the rudder head and used for turning side to side in steering. In small boats hand power is used; in large vessels, the tiller is moved by means of mechanical appliances. See Illust. of Rudder. Cf. 2d Helm, 1.

ch soldiers were formerly compelled to ride for punishment. Johnson. -- Timber scribe, a metal tool or pointed instrument for marking timber. Simmonds. -- Timber sow. (Zoöl.) Same as Timber worm, below. Bacon. -- Timber tree, a tree suitable for timber. -- Timber worm (Zoöl.), any larval insect which burrows in tim…

nce found as an oxide in the mineral cassiterite, and reduced as a soft white crystalline metal, malleable at ordinary temperatures, but brittle when heated. It is not easily oxidized in the air, and is used chiefly to coat iron to protect it from rusting, in the form of tin foil with mercury to form the reflective sur…

One of the metals, colors, or furs used in armory.

A mender of brass kettles, pans, and other metal ware. "Tailors and tinkers." Piers Plowman.

To make, or give forth, small, quick, sharp sounds, as a piece of metal does when struck; to clink. As sounding brass, or a tinkling cymbal. 1 Cor. xiii. 1. The sprightly horse Moves to the music of his tinkling bells. Dodsley.