Rankine scale
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The Rankine scale is an absolute scale of thermodynamic temperature named after the University of Glasgow engineer and physicist W. J. M. Rankine, who proposed it in 1859. As on the Kelvin scale, whic
W.J. Rankine
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
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.