Fahrenheit, Gabriel Daniel (1686–1736)
Polish-born German instrument-maker who invented the alcohol thermometer
(1709) and the first mercury-in-glass thermometer (1714), and discovered
the variation of boiling point with
atmospheric pressure, but who 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the Fahrenheit scale has been superceded by the Celsius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.
See also third law of thermodynamics.