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Hygrometer - Daniell Type Object Reg. No: ST 022144

Summary:
Daniell hygrometer, used at Melbourne Observatory.

Consists of 2 thermometers, one immersed in a volatile liquid which by evaporation, lowers temperature to dewpoint. The other thermometer is fixed to the stand & records temperature of uncooled air. Originally invented by English chemist and meteorologist John Frederic Daniell in 1820.

A hygrometer measures the amount of humidity in the atmosphere.
Acquisition Information:
Transfer from Melbourne Observatory, 1945
Discipline: Technology
Dimensions: 18.2 cm (Height), 12 cm (Width), 6.5 cm (Length)

More information

Tagged with: hygrometers, meteorological apparatus instruments
Themes this item is part of: Melbourne Observatory Collection, Science & Measurement Collection, Positional Astronomy at Melbourne Observatory, Weights & Measures at Melbourne Observatory, Melbourne Observatory & Standard Time in Victoria, Astrographic Catalogue, Transits of Venus, 1874 & 1882, Buildings at Melbourne Observatory, Star Observations & Personal Equation, Meteorology at Melbourne Observatory, 1863-1908, Melbourne Observatory, 1863-1944, Geodetic Survey of Victoria, 1858-1872
Primary Classification: PHYSICAL SCIENCES
Secondary Classification: Meteorology
Tertiary Classification: hygrometers
User: Melbourne Observatory, South Yarra, Victoria, Australia

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