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Anders Celsius was born in Uppsala, Sweden, on 27 November 1701. [1] His family originated from Ovanåker in the province of Hälsingland. [2] Their family estate was at Doma, also known as Höjen or Högen (locally as Högen 2). The name Celsius is a latinization of the estate's name (Latin celsus 'mound').
Anders Celsius's original thermometer used a reversed scale, with 100 as the freezing point and 0 as the boiling point of water.. In 1742, Swedish astronomer Anders Celsius (1701–1744) created a temperature scale that was the reverse of the scale now known as "Celsius": 0 represented the boiling point of water, while 100 represented the freezing point of water. [5]
1742 — Anders Celsius proposed a temperature scale in which 100 represented the temperature of melting ice and 0 represented the boiling point of water at 25 inches and 3 lines of barometric mercury height. [8] This corresponds to 751.16 mm, [9] so that on the present-day definition, this boiling point is 99.67 degrees Celsius. [10]
The degree Celsius (°C) can refer to a specific temperature on the Celsius scale as well as a unit to indicate a temperature interval (a difference between two temperatures). From 1744 until 1954, 0 °C was defined as the freezing point of water and 100 °C was defined as the boiling point of water, both at a pressure of one standard atmosphere.
Celsius was also a prominent runologist. [2] Olof Celsius's father was the mathematician Magnus Celsius and his nephew Anders Celsius (son of his brother and astronomy professor Nils Celsius) was an astronomer who invented a temperature scale where 100 originally represented the freezing point of water and 0 represented the boiling point.
300 years ago scientist Daniel Fahrenheit invented a temperature measurement — donning his last name. Once Fahrenheit came up with the blueprint for the modern thermometer, using mercury — he ...
His grandson Anders Celsius was an astronomer who invented a temperature scale where 100 originally represented the freezing point of water and 0 represented the boiling point. Jean-Pierre Christin, in 1744 reversed the scale to create the centigrade scale, renamed in 1948 to the Celsius scale in use today. [5] [6]
With the Fahrenheit and Celsius scales now both defined by the kelvin, this relationship was preserved, a temperature interval of 1 °F being equal to an interval of 5 ⁄ 9 K and of 5 ⁄ 9 °C. The Fahrenheit and Celsius scales intersect numerically at −40 in the respective unit (i.e., −40 °F ≘ −40 °C).