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Quiet; calm; undisturbed; peaceful; not agitated; as, the atmosphere is tranquil; the condition of the country is tranquil. A style clear, tranquil, easy to follow. De Quincey.

ditions of experience which, though affording the conditions of experience, transcend the sphere of that contingent knowledge which is acquired by experience.

A libration of the starry sphere in the Ptolemaic system; a motion ascribed to the firmament, to account for certain small changes in the position of the ecliptic and of the stars.

One of the two small circles of the celestial sphere, situated on each side of the equator, at a distance of 23º 28min, and parallel to it, which the sun just reaches at its greatest declination north or south, and from which it turns again toward the equator, the northern circle being called the Tropic of Cancer, and…

sun is less than 18º below the horizon, occasioned by the illumination of the earth's atmosphere by the direct rays of the sun and their reflection on the earth.

aving the properties exhibited by gases under very low pressures (one millionth of an atmosphere or less). Matter under this condition, which has been termed the fourth state of matter, is sometimes called radiant matter.

f a surface at which the curvatures of the normal sections are all equal to each other. A sphere may be osculatory to the surface in every direction at an umbilicus. Called also umbilic.

Same as Unguis, 3. Spherical ungula (Geom.), a part of a sphere bounded by two planes intersecting in a diameter and by a line of the surface of the sphere.

ounces, pounds, tons, etc., per square inch, square foot, or square yard, etc., or in atmospheres, or inches of mercury or water, or the like.

g islands. Its secretions are poisonous, and it has been fabulously reported that the atmosphere about it is deleterious. Called also bohun upas.

parts of the hull of a vessel that are properly above water. -- Upper world. (a) The atmosphere. (b) Heaven. (c) This world; the earth; -- in distinction from the underworld.

The condition of rarefaction, or reduction of pressure below that of the atmosphere, in a vessel, as the condenser of a steam engine, which is nearly exhausted of air or steam, etc.; as, a vacuum of 26 inches of mercury, or 13 pounds per square inch. Vacuum brake, a kind of continuous brake operated by exhausting the a…

A groove; a fossa; as, the vallecula, or fossa, which separates the hemispheres of the cerebellum.

In a loose and popular sense, any visible diffused substance floating in the atmosphere and impairing its transparency, as smoke, fog, etc. The vapour which that fro the earth glood [glided]. Chaucer. Fire and hail; snow and vapors; stormy wind fulfilling his word. Ps. cxlviii. 8.

Passing through the air on wings, or by the buoyant force of the atmosphere; flying; having the power to fly. [Obs.]

A frequented track; habitual place of action; sphere; as, the walk of the historian. The mountains are his walks. Sandys. He opened a boundless walk for his imagination. Pope.

Sphere or scope of observation. Jer. Taylor. The public ministers that fell in my way. Sir W. Temple.

The state of the air or atmosphere with respect to heat or cold, wetness or dryness, calm or storm, clearness or cloudiness, or any other meteorological phenomena; meteorological condition of the atmosphere; as, warm weather; cold weather; wet weather; dry weather, etc. Not amiss to cool a man's stomach this hot weathe…

An instrument to indicate the state of the atmosphere, especially changes of atmospheric pressure, and hence changes of weather, as a barometer or baroscope. Poor man's weatherglass. (Bot.) See under Poor.

x wedge. (Mach. & Carpentry) See under Fox. -- Spherical wedge (Geom.), the portion of a sphere included between two planes which intersect in a diameter.