Fahrenheit, Gabriel Daniel (1686-1736)
German-born Dutch instrument maker who introduced the mercury-in-glass thermometer and discovered the variation of boiling point with atmospheric pressure, but is best remembered for his Fahrenheit temperature scale. This has 180 divisions (degrees) between the freezing point of water (32°F) and its boiling point (212°F). Although still commonly used in the United States, elsewhere the Fahrenheit scale has been superceded by the Celsius scale first proposed by Anders Celsius.
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