Daniell's hygrometer

Definitions

  • Webster's Revised Unabridged Dictionary
    • 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, 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 of one in the air, determines the humidity.
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Usage

In literature:

DANIEL'S HYGROMETER, observed at 3 P.M., daily, and compared with the mean temperature.
"Narrative of the surveying voyages of His Majesty's ships Adventure and Beagle, between the years 1826 and 1836" by Robert FitzRoy
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