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player or players are placed and upon which the attention of the spectators is therefore concentrated. Hence, consspicuous position before the public; as, politicians who are never happy except in the limelight.

A spherulitic cavity often with concentric chambers, observed in some volcanic rocks, as in rhyolitic lavas. It is supposed to be produced by expanding gas, whence the name.

Native hydrous carbonate of copper, usually occurring in green mammillary masses with concentric fibrous structure.

les, currants, etc. It is levorotatory or dextrorotatory according to the temperature and concentration. An artificial variety is a derivative of succinic acid, but has no action on polarized light, and thus malic acid is a remarkable case of physical isomerism.

Derangement of the mind in regard of a single subject only; also, such a concentration of interest upon one particular subject or train of ideas to show mental derangement.

A process of desilverizing argentiferous lead by repeated meltings and skimmings, which concentrate the silver in the molten bath, the final skimmings being nearly pure lad. The processwas invented in 1833 by Hugh Lee Pattinson, an English metallurgist.

cuts the teeth at about the middle of their height, and, in a circular gear, is a circle concentric with the axis of the gear; the line, or circle, on which the pitch of teeth is measured. -- Pitch of a roof (Arch.), the inclination or slope of the sides expressed by the height in parts of the span; as, one half pitc…

Hence: The which contains the strength of life; the vital or essential part; concentrated force; vigor; strength; importance; as, the speech lacked pith. Enterprises of great pith and moment. Shak. Pith paper. Same as Rice paper, under Rice.

In the Ptolemaic system, the outermost of the revolving concentric spheres constituting the universe, the motion of which was supposed to carry with it all the inclosed spheres with their planets in a daily revolution from east to west. See Crystalline heavens, under Crystalline. The motions of the greatest persons in…

its rarest virtue, or most subtle and essential constituent in a small quantity; pure or concentrated essence. Let there be light, said God; and forthwith light Ethereal, first of things, quintessence pure, Sprung from the deep. Milton.

A bow or arch exhibiting, in concentric bands, the several colors of the spectrum, and formed in the part of the hemisphere opposite to the sun by the refraction and reflection of the sun's rays in drops of falling rain.

The act or practice of collecting or concentrating the mind; concentration; self-control. [Archaic] From such an education Charles contracted habits of gravity and recollection. Robertson.

The plane figure included between the circumferences of two concentric circles.

A concentrated fire from pieces of artillery, as in endeavoring to make a break in a fortification; a volley.

on blue (Dyeing), a deep blue liquid used in dyeing, and obtained by dissolving indigo in concentrated sulphuric acid. Brande & C. -- Saxon green (Dyeing), a green color produced by dyeing with yellow upon a ground of Saxon blue.

A giddy or thoughtless person; one incapable of concentration or attention. [Written also scatter-brains.]

-shaped cup used in the first heating in assaying, to remove the earth and gangue, and to concentrate the gold and silver in a lead button.

Concentration of one's interests on one's self; self-love; selfishness. Emerson.

In ancient astronomy, one of the concentric and eccentric revolving spherical transparent shells in which the stars, sun, planets, and moon were supposed to be set, and by which they were carried, in such a manner as to produce their apparent motions.

her, like the tube of a small telescope or a spyglass; especially (Mach.), constructed of concentric tubes, either stationary, as in the telescopic boiler, or movable, as in the telescopic chimney of a war vessel, which may be put out of sight by being lowered endwise.