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ong themselves, but do not tend to separate from each other as the particles of gases and vapors do; neither solid nor aëriform; as, liquid mercury, in distinction from mercury solidified or in a state of vapor.

The science of the determination of the density of vapors and gases.

aple, from the sap of which sugar is made, in the United States, in great quantities, by evaporation; the red or swamp maple is A. rubrum; the silver maple, A. dasycarpum, having fruit wooly when young; the striped maple, A. Pennsylvanium, called also moosewood. The common maple of Europe is A. campestre, the sycamore…

To treat with mercury; to expose to the vapor of mercury.

To ascend in vapors; to take the form of a meteor. Evelyn.

ar characteristic of milk; a hard white crystalline slightly sweet substance obtained by evaporation of the whey of milk. It is used in pellets and powder as a vehicle for homeopathic medicines, and as an article of diet. See Lactose.

Visible watery vapor suspended in the atmosphere, at or near the surface of the earth; fog.

nsensible distances. -- Molecular weight (Chem.), the weight of a molecule of any gas or vapor as compared with the hydrogen atom as a standard; the sum of the atomic weights of the constituents of a molecule; thus, the molecular weight of water (H2O) is 18.

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.

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…