Negretti and Zambra's patent recording thermometers

Made:: 1898 in London

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Negretti and Zambra's patent recording thermometers, 1898. Two mercury in glass thermometers (one wet, one dry bulb) are set in rotating frame, released electrically at predetermined time. Constriction in tube causes mercury column to break on turning upside down. With electric cell.

Details

Category:: Meteorology

Object Number:: 1995-1789

Materials:: mercury, glass, brass and iron

Measurements:: frame: 49 x 25 x 12.5 cm
electric cell: 19.8 x 9.7 cm

type:: recording thermometer

credit:: Meteorological Office

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