Engineer, physicist and glass blower,
Fahrenheit (1686-1736)
decided to create a temperature scale based upon three fixed temperature points \u2013 that of freezing water, human body temperature, and the coldest point that he could repeatably cool a solution of water, ice and a kind of salt, ammonium chloride.
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Fahrenheit proposed his temperature scale in 1724, basing it on two reference points of temperature. ... A second point, 96 degrees, was approximately the human body's temperature (sanguine hominis sani, the blood of a healthy person).
