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Any instrument showing the changes in the weight of the atmosphere; also, less appropriately, any instrument that indicates - or foreshadows changes of the weather, as a deep vial of liquid holding in suspension some substance which rises and falls with atmospheric changes.

An instrument for recording both pressure and temperature, as of the atmosphere.

defense. Such a barricade as would greatly annoy, or absolutely stop, the currents of the atmosphere. Derham.

g more or less of the ferric oxide (Fe2O3) and the subsequent change of this in a reduced atmosphere to the magnetic oxide (Fe2O4).

The property of floating on the surface of a liquid, or in a fluid, as in the atmosphere; specific lightness, which is inversely as the weight compared with that of an equal volume of water.

A disease frequently induced by remaining for some time in an atmosphere of high pressure, as in caissons, diving bells, etc. It is characterized by neuralgic pains and paralytic symptoms. It is variously explained, most probably as due to congestion of internal organs with subsequent stasis of the blood.…

An atmosphere of rare matter, composed principally of incandescent hydrogen gas, surrounding the sun and enveloping the photosphere. Portions of the chromosphere are here and there thrown up into enormous tongues of flame.

The condition of a place in relation to various phenomena of the atmosphere, as temperature, moisture, etc., especially as they affect animal or vegetable life.

A collection of visible vapor, or watery particles, susponded in the upper atmosphere. I do set my bow in the cloud. Gen. ix. 13.

ses from the mutual chemical action and reaction of the combustible and the oxygen of the atmosphere, whereby a new compound is formed. Ure. Supporter of combustion (Chem.), a gas as oxygen, the combination of which with a combustible, as coal, constitutes combustion.

ance, or quality; to transform; to transmute; as, to convert water into ice. If the whole atmosphere were converted into water. T. Burnet. That still lessens The sorrow, and converts it nigh to joy. Milton.

A circle, usually colored, seen in peculiar states of the atmosphere around and close to a luminous body, as the sun or moon.

s, consisting of a thin glass globe, which is weighed in the gas or gases, and then in an atmosphere of known density.

Dissolving; liquefying by contact with the air; capable of attracting moisture from the atmosphere and becoming liquid; as, deliquescent salts.

.), the number of degreees that the dew-point is lower than the actual temperature of the atmosphere. -- Depression of the pole, its apparent sinking, as the spectator goes toward the equator. -- Depression of the visible horizon. (Astron.) Same as Dip of the horizon, under Dip.

Moisture from the atmosphere condensed by cool bodies upon their surfaces, particularly at night. Her tears fell with the dews at even. Tennyson.

mperature at which dew begins to form. It varies with the humidity and temperature of the atmosphere.

r mechanical or atmospheric influences. Marlites are not disintegrated by exposure to the atmosphere, at least in six years. Kirwan.

or drawing out the gases from above it. -- Natural draught, the draught produced by the atmosphere flowing, by its own weight, into a chimney wherein the air is rarefied by heat. -- On draught, so as to be drawn from the wood (as a cask, barrel, etc.) in distinction from being bottled; as, ale on draught. -- Sheer…

trate of calcium in consequence of the action in consequence of nitric acid formed in the atmosphere.