Mercury Thermometer for Underground Temperatures, 1861-1881

Made:
1861-1881 in London
designer:
Joseph David Everett
maker:
F M Stapff

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Slow-action thermometer designed by Stapff & Everett and made by Negretti & Zambra, sealed in a glass sheath and with the bulb insulated by tallow or stearine, with outer copper case, as used by the British Association between 1868 and 1881 to measure the rate at which the temperature of the Earth increases with depth. London, England, 1861-1881.

Details

Category:
Heat
Object Number:
1889-9
Materials:
cotton thread, cotton wool, glass, iron, leather, mercury and tallow or stearine
Measurements:
case: x 300 mm x , 40 mm,
thermometer: x 255 mm x , 24 mm,
type:
thermometer (mercury)
taxonomy:
  • measuring devices
  • measuring devices
credit:
Negretti & Zambra