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An instrument for measuring the degree of moisture of the atmosphere. Daniell's hygrometer, a form of hygrometer consisting of a bent glass tube terminating in two bulbs, 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, cool…

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

Of or pertaining to hygrometry; made with, or according to, the hygrometer; as, hygrometric observations.

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