Temperature history origin, you must know

Thermometer for dates back to ancient Greek times, at that time a call & other; Hero” The ancient greeks invented the steam engine like things, and its principle is the heat expansion. But to say the word to the temperature, have to mention is the granddaddy of the thermometer & ndash; — Galileo. In 1952, Galileo invented the similar thermometer through air contraction and expansion, the change of temperature, is the world's first thermometer. It is well known that temperature has two measurement units, Fahrenheit and Celsius. It as early as in 1742, the Swedish astronomer Anders Celsius invented the word, he put the water freezing point positioning 0 degrees, 100 degrees water boiling point positioning. Specific transformation formula: F = 9/5 C + 32, C = 5/9 ( F - 32) 。 Galileo thermometer is illustrated below: