Hypsometric thermometer, mercury in glass, sheathed, millibar (hectopascal) scale

Hypsometric thermometer, mercury in glass, sheathed, scale in millibars, by Rudolf Fuess of Berlin-Steglitz, Germany, 1891-1913. Numbered 3717, scale 615 to 1070

Hypsometric thermometers indicate altitude or pressure by measuring the boiling point of water, which decreases with altitude.

Details

Category:
Meteorology
Object Number:
1995-1767
Materials:
glass and mercury
Measurements:
tube: 29 cm
type:
hypsometric thermometer
credit:
Meteorological Office