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om a single tree. -- Pole of a lens (Opt.), the point where the principal axis meets the surface. -- Pole plate (Arch.), a horizontal timber resting on the tiebeams of a roof and receiving the ends of the rafters. It differs from the plate in not resting on the wall.

To become smooth, as from friction; to receive a gloss; to take a smooth and glossy surface; as, steel polishes well. Bacon.

ng wheel, a wheel or disk coated with, or composed of, abrading material, for polishing a surface.

Smooth; polished. [Obs.] Rays of light falling on a polite surface. Sir I. Newton.

Having the surface covered with a fine yellow dust, like pollen.

or based upon, many cones. Polyconic projection (Map Making), a projection of the earth's surface, or any portion thereof, by which each narrow zone is projected upon a conical surface that touches the sphere along this zone, the conical surface being then unrolled. This projection differs from conic projection in that…

ructifications are in uncovered roundish points, called sori, scattered over the inferior surface of the frond or leaf. There are numerous species.

A genus of fungi having the under surface full of minute pores; also, any fungus of this genus.

are. Porcelain, by being pure, is apt to break. Dryden. Ivory porcelain, porcelain with a surface like ivory, produced by depolishing. See Depolishing. -- Porcelain clay. See under Clay. -- Porcelain crab (Zoöl.), any crab of the genus Porcellana and allied genera (family Porcellanidæ). They have a smooth, polished c…

Any one of several species of embiotocoids, or surf fishes, of the Pacific coast. The name is also given locally to several other fishes, as the bur fish. [Written also porgee, porgie, and paugy.]

a handsome marine gastropod shell (Oliva porphyria), having a dark red or brown polished surface, marked with light spots, like porphyry.

One of the furs; a surface composed of patches which are supposed to represent crutch heads; they are always alternately argent and azure, unless otherwise specially mentioned. Counter potent (Her.), a fur differing from potent in the arrangement of the patches.

r of an object; sometimes, in microscopes, the number of times it multiplies the apparent surface.

ttom (whence the name), may be diffused through the solution, or may float 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…

- probably so called from the resemblance of the wartlike crystals to the mammillæ on the surface of prehnite.

st some obstacle or opposing force; a force in the nature of a thrust, distributed over a surface, often estimated with reference to the upon a unit's area. Atmospheric pressure, Center of pressure, etc. See under Atmospheric, Center, etc. -- Back pressure (Steam engine), pressure which resists the motion of the pisto…

The art of printing from the surface of type, plates, or engravings in relief, by means of a press; the work so done. MacKellar.

The first coating of plaster in work of three coats upon laths. Its surface is scratched once to form a better key for the next coat. In the United States called scratch coat. Brande & C.

To lay the first color, coating, or preparation upon (a surface), as in painting; as, to prime a canvas, a wall.

The first coating of color, size, or the like, laid on canvas, or on a building, or other surface.