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r of the nature of, unrefined or raw sugar, obtained from the juice of the sugar cane by evaporating and draining off the molasses. Muscovado sugar contains impurities which render it dark colored and moist.

To reduce (as a liquid) to a fine spray or vapor; to atomize.

often very injurious to fruit trees and shade trees. The female is wingless. Called also vaporer moth.

le and characteristic of the compounds of osmium. It has a burning taste, and gives off a vapor, which is a powerful irritant poison, violently attacking the eyes, and emitting a strong chlorinelike odor. Formerly improperly called osmic acid.

ances, esp. lime, in the oxyhydrogen flame. Coal gas (producing the oxygas light), or the vapor of ether (oxyether light) or methylated spirit (oxyspirit light), may be substituted for hydrogen.

To become vapid, tasteless, dull, or insipid; to lose strength, life, spirit, or taste; as, the liquor palls. Beauty soon grows familiar to the lover, Fades in the eye, and palls upon the sense. Addisin.

palmyra, and the Caryota urens. When fermented it yields by distillation arrack, and by evaporation jaggery. Called also palm toddy. -- Palm worm, or Palmworm. (Zoöl.) (a) The larva of a palm weevil.

A closed vessel for boiling or evaporating. See Vacuum pan, under Vacuum.

onate, and has a strong alkaline reaction. It is obtained by lixiviating wood ashes, and evaporating the lye, and has been an important source of potassium compounds. It is used in making soap, glass, etc.

A thin film formed on the surface of an evaporating solution.

Jutting over; projecting; overhanging. "A vapor sometime like a . . . pendent rock." Shak.

Having the nature or qualities of a pestilence. "Sends the pestilential vapors." Longfellow.

s, if the components be salt and water, and the phases salt, ice, saturated solution, and vapor, the system is invariant, that is, there is only one set of conditions under which these four phases can exist in equilibrium. If only three phases be considered, the system is univariant, that is, the fixing of one conditio…

The process of constructive metabolism by which carbohydrates are formed from water vapor and the carbon dioxide of the air in the chlorophyll-containing tissues of plants exposed to the action of light. It was formerly called assimilation, but this is now commonly used as in animal physiology. The details of the proce…

exas, New Mexico, and Arizona, a broad, level spot, on which subsequently becomes dry by evaporation. Bartlett.

of a precipitate; as, water precipitates camphor when in solution with alcohol. The light vapor of the preceding evening had been precipitated by the cold. W. Irving.

An instrument for measuring the tension of the aqueous vapor in the atmosphere, being essentially a wet and dry bulb hygrometer.

ving it a fibrous structure. It is supposed to be produced by the disengagement of watery vapor without liquid or plastic lava. It is much used, esp. in the form of powder, for smoothing and polishing. Called also pumice stone.

Thin, flying, broken clouds, or any portion of floating vapor in the sky. Shak. The winds in the upper region, which move the clouds above, which we call the rack, . . . pass without noise. Bacon. And the night rack came rolling up. C. Kingsley.

which the more volatile portions are separated from the less volatile by the process of evaporation and condensation; a rectifier.