Anders Celsius
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Anders Celsius was a Swedish astronomer, physicist and mathematician. He was professor of astronomy at Uppsala University from 1730 to 1744, but traveled from 1732 to 1735 visiting notable observatori
Portrait by Olof Arenius
Anders Celsius c. 1730s
The observatory of Anders Celsius, from a contemporary engraving
De novo in fluviis norlandiarum piscandi modo, 1738
Celsius
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The degree Celsius is the unit of temperature on the Celsius temperature scale, one of two temperature scales used in the International System of Units, the other being the closely related Kelvin scal
Anders Celsius
…the Uppsala Astronomical Observatory in 1741, and in 1742 proposed (an inverted form of) the centigrade temperature scale, which was later renamed Celsius in his honour. Anders Celsius was born in Uppsala, Sweden, on 27 November 1701. His family originated from Ovanåker in the province of Hälsingland…
A thermometer calibrated in degrees Celsius, showing a temperature of 0 °C in a glass of ice and water
Measurement of an ice-water mixture in equilibrium at 370 m above sea level. Thermometer shows 0.05 °C. The slight deviation from 0 °C is due to instrument uncertainty and trace water impurities.
Boiling point of water measured at an altitude of ~370 m a.s.l. The 99.7 °C result reflects lower atmospheric pressure (~970 hPa), combined with minor instrument uncertainty and trace water impurities.