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Note:  Do not rely on this information. It is very old.

Fahrenheit Scale

Fahrenheit Scale of temperature, the scale generally adopted in England, is that which was introduced in 1714 by Fahrenheit. The temperature of melting ice is called 32° and that of water boiling at ordinary pressure is called 212°, there being a range of 180° between these two-fixed points on the scale. The temperature of 0° Fahr. is approximately that of a mixture of pounded ice and salt, and was so chosen because that was the greatest intensity of cold then known. The Centigrade scale has certain advantages, and has partially superseded the Fahrenheit.