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>The Fahrenheit scale (/ˈfɑːrənhaJt/) is a temperature scale based on one proposed in 1724 by physicist Daniel Gabriel Fahrenheit (1686–1736).[1] It uses the degree Fahrenheit (symbol: °F) as the unit. Several accounts of how he originally defined his scale exist. The lower defining point, 0 °F, was established as the freezing temperature of a solution of brine made from equal parts of ice, water and a salt (ammonium chloride).[2] Further limits were established as the freezing point of water (32 °F) and his best estimate of the average human body temperature (96 °F, about 2.6 °F less than the modern value due to a later redefinition of the scale).[3]