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the ground, and capable of being turned as the direction of the wind varies. -- Post and stall (Coal Mining), a mode of working in which pillars of coal are left to support the roof of the mine.

nate obtained by leaching wood ashes, either as a strong solution (lye), or as a white crystalline (pearlash).

A variety of cryptocrystalline of a leek-green color.

Of or pertaining to a prebend; holding a prebend; as, a prebendal priest or stall. Chesterfield.

at or near the surface. Red precipitate (Old. Chem), mercuric oxide (HgO) a heavy red crystalline powder obtained by heating mercuric nitrate, or by heating mercury in the air. Prepared in the latter manner, it was the precipitate per se of the alchemists. -- White precipitate (Old Chem.) (a) A heavy white amorphous…

A pale green mineral occurring in crystalline aggregates having a botryoidal or mammillary structure, and rarely in distinct crystals. It is a hydrous silicate of alumina and lime.

Pertaining to, or designating, a tetrabasic acid of benzene obtained as a white crystalline substance; -- probably so called from the resemblance of the wartlike crystals to the mammillæ on the surface of prehnite.

A defect of vision consequent upon advancing age. It is due to rigidity of the crystalline lens, which producepresbytia.

nder; to frustrate; to stop; to thwart. "This vile purpose to prevent." Shak. Perhaps forestalling night prevented them. Milton.

One who goes before; one who forestalls or anticipates another. [Obs.] Bacon.

y rocks (Geol.), a term early used for rocks supposed to have been first formed, being crystalline and containing no organic remains, as granite, gneiss, etc.; -- called also primitive rocks. The terms Secondary, Tertiary, and Quaternary rocks have also been used in like manner, but of these the last two only are now i…

l 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 a government ought to be, as the motions of the planets, under primum mobile. Bacon.

ough the point of sight perpendicular to the perspective plane. -- Principal section (Crystallog.), a plane passing through the optical axis of a crystal.

Same as Orthorhombic. Prismatic borax (Chem.), borax crystallized in the form of oblique prisms, with ten molecules of water; -- distinguished from octahedral borax. -- Prismatic colors (Opt.), the seven colors into which light is resolved when passed through a prism; primary colors. See Primary colors, under Color.…

Crystallography of organic forms; -- a division of morphology created by Haeckel. It is essentially stereometric, and relates to a mathematical conception of organic forms. See Tectology.

the acetylene or tetrolic series, analogous to propionic acid, and obtained as a white crystalline substance.C3H2O2, CH.C.COOH

e the basis of all albuminous substances, whence its name. Protein crystal. (Bot.) See Crystalloid, n., 2.

taining to, derived from, or designating, an organic acid which is obtained as a white crystalline substance from catechin, asafetida, oil of cloves, etc., and by distillation itself yields pyrocatechin.

An alkaloid found in opium in small quantities, and extracted as a white crystalline substance.

al term for regular induction into a benefice, comprehending nomination, collation, and installation.