Fahrenheit temperature scale (symbol ℉). In 1724, the German Fahrenheit developed the Fahrenheit temperature scale. He set the solidification temperature of salt water of a certain concentration as 0℉, the solidification temperature of pure water as 32℉, and the boiling temperature of water under standard atmospheric pressure as 212℉. The middle is divided into 180 equal parts, each part represents 1 degree. This is the Fahrenheit temperature scale, represented by the symbol F, which is the Fahrenheit temperature.