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A form of hygrometer having wet and dry bulb thermometers, with an adjustable index showing directly the percentage of moisture in the air, etc.

bs, the one covered with muslin, the other of black glass, and containing ether and a thermometer. Ether being poured on the muslin, the black ball, cooled by the evaporation of the ether within, is soon covered with dew; at this moment, the inclosed thermometer gives the dew-point, and this, compared with the reading…

water. It consists of a vessel for water, with a lamp for heating it, and an inclosed thermometer for showing the temperature of ebullition.

virtue of its weight and its motion; the force with which any body is driven or impelled; momentum.

To signify; to purport; to be of moment. "For that . . . importeth to the work." Bacon.

The quality or state of being important; consequence; weight; moment; significance. Thy own importance know, Nor bound thy narrow views to things below. Pope.

Something made or done offhand, at the moment, or without previous study; an extemporaneous composition, address, or remark.

nity. Blackstone. How doth the little busy bee Improve each shining hour. I. Watts. Those moments were diligently improved. Gibbon. True policy, as well as good faith, in my opinion, binds us to improve the occasion. Washington.

To invent, or provide, offhand, or on the spur of the moment; as, he improvised a hammer out of a stone.

The effect of an impelling force; motion produced by a sudden or momentary force.

The act of impelling or driving onward, or the state of being impelled; the sudden or momentary agency of a body in motion on another body; also, the impelling force, or impulse. "The impulsion of the air." Bacon.

Acting momentarily, or by impulse; not continuous; -- said of forces.

insulated copper wire, surrounded by another coil of very fine insulated wire, in which a momentary current is induced, when a current (as from a voltaic battery), passing through the inner coil, is made, broken, or varied. The inner coil has within it a core of soft iron, and is connected at its terminals with a conde…

Persuading us that something must be indulged to public manners. Jer. Taylor. Yet, yet a moment, one dim ray of light Indulge, dread Chaos, and eternal Night! Pope.

A point in duration; a moment; a portion of time too short to be estimated; also, any particular moment. There is scarce an instant between their flourishing and their not being. Hooker.

To indicate the whole of; to give the sum or total of; as, an integrating anemometer, one that indicates or registers the entire action of the wind in a given time.

p., an instrument by means of which the area of a figure can be measured directly, or its moment of inertia, or statical moment, etc., be determined.

A moment; an instant; as, I will be ready in a jiffy. [Colloq.] J. & H. Smith.

inspired and gently swelled the sail. Dryden. Just now, the least possible time since; a moment ago.

ravels uniformly through the field of a magnifying glass. The observer sees each picture, momentarily, through a slit in a revolving disk, and these glimpses, blended by persistence of vision, give the impression of continuous motion.