goldbeater's skin hygrometer

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Goldbeater's skin — the outer membrane of calf s intestine is a parchment traditionally used in the process of reducing gold into mere 1μm thick leaves.Up to 120 sheets of gold laminated with goldbeater s skin can be beaten at the same time, since the skin is thin,… … Wikipedia
hygrometer — /huy grom i teuhr/, n. any instrument for measuring the water vapor content of the atmosphere. [1660 70; HYGRO + METER] * * * ▪ meteorological instrument instrument used in meteorological science to measure the humidity, or amount of water… … Universalium
radiosonde — /ray dee oh sond /, n. Meteorol. an instrument that is carried aloft by a balloon to send back information on atmospheric temperature, pressure, and humidity by means of a small radio transmitter. Cf. rawinsonde [1935 40; RADIO + SONDE] * * * ▪… … Universalium

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