psychrometer

Definitions

  • WordNet 3.6
    • n psychrometer a hygrometer consisting of a dry-bulb thermometer and a wet-bulb thermometer; their difference indicates the dryness of the surrounding air
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Webster's Revised Unabridged Dictionary
    • n Psychrometer An instrument for measuring the tension of the aqueous vapor in the atmosphere, being essentially a wet and dry bulb hygrometer.
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Century Dictionary and Cyclopedia
    • n psychrometer An instrument for determining the tension of the aqueous vapor in the air or the relative humidity. It consists of two thermometers, commonly called the dry-bulb and the wet-bulb. The dry-bulb thermometer gives the temperature of the air. The wet-bulb thermometer, whose bulb is covered with muslin wetted at the time of observation, cools below the air-temperature, and indicates what is known as the temperature of evaporation. From the combined readings of the two thermometers, along with that of the barometer at the time, the pressure of the vapor in the air is obtained by means of an empirical formula, or more conveniently from specially constructed tables.
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Chambers's Twentieth Century Dictionary
    • n Psychrometer sī-krom′e-tėr an instrument for measuring the tension of aqueous vapour in the atmosphere: a wet and dry bulb hygrometer
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Etymology

Webster's Revised Unabridged Dictionary
Gr. psychro`s cold + -meter,: cf. F. psychromètre,
Chambers's Twentieth Century Dictionary
Gr. psychros, cold, psychein, to blow, metron, a measure.

Usage

In literature:

The sling psychrometer as used by the U.S.
"The Dollar Hen" by Milo M. Hastings
The humidity of the air was observed both by August's psychrometer and Saussure's hygrometer.
"The Voyage of the Vega round Asia and Europe, Volume I and Volume II" by A.E. Nordenskieold
C. between the thermometers of the psychrometer of August's construction.
"The Eruption of Vesuvius in 1872" by Luigi Palmieri
To overcome this difficulty another form of psychrometer has been devised.
"Practical Exercises in Elementary Meteorology" by Robert DeCourcy Ward
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In news:

Combination hot-wire anemometer and psychrometer accessory head AAT3 gets into ducts easily.
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