Do you know the origin of the temperature of the unit?

Our common thermometer measurement unit is Celsius and Fahrenheit, Celsius is ℃, said and expressed in ℉ degrees Fahrenheit. Is ℉ F Fahrenheit, symbols, unit, in 1724, warren hite formulated the Fahrenheit scale, first, he must be the temperature of the concentration of salt water freezes at 0 ℉, will be his wife's body temperature is set to 100 ℉, later to rigorous, and the freezing point of water temperature at 32 ℉, a standard atmospheric pressure, the boiling point of water temperature at 212 ℉, middle is divided into 180 equal parts, each equal parts represent 1 degree, this is the Fahrenheit scale. Fahrenheit is made after over 30 years, the Swede was taken, Theseus in 1742 improved the calculation method of warren hite thermometer, his colleagues le meur reversed the two point temperature of value ( The boiling point of 100 degrees, freezing point 0 degrees) Become the percentage of temperature, namely the Celsius temperature, expressed in ℃. Fahrenheit and Celsius temperature relationship is ℉ = 9/5 ℃ + 32, or 5/9 ℃ = ( ℉- 32) 。 Celsius scale, the symbol for C, the unit is ℃, freezing point temperature of 0 degrees Celsius, the boiling point of 100 degrees Celsius. And Fahrenheit to freezing point temperature at 32 degrees Fahrenheit, the boiling point of 212 degrees Fahrenheit. So 1 c ( 1 equal parts) Is equal to 9/5 degrees Fahrenheit, then, according to the freezing point temperature can get Celsius ( C) And Fahrenheit ( F) The change of formula is: C = 5 & times; ( F - 32) / 9 F = 9报; C / 5 + 321℃= ( 9× 1/5 + 32) ℉=33. 8 ℉ F - in the formula C - Fahrenheit Celsius