, is commonly used in the same sense with Hygrometer. Wolfius, however, regarding the etymology of the word, makes some difference. According to him, the Hygroscope only shews the alterations of the air in respect of humidity and dryness, but the hygrometer measures them. A Hygroscope therefore is only an indefinite or less accurate hygrometer.
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Entry taken from A Mathematical and Philosophical Dictionary, by Charles Hutton, 1796.
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