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Anders Celsius, Temperature Scale > 
Anders Celsius became famous for his recommendation in 1742 to divide the temperature scale of a mercury thermometer at 760mm mercury air pressure into 100 degrees, where 100 is the frozing point and 0 the boiling point of water. Because of the detailed fixation of the measuring circumstances and methods this definition was more exact and enabled a better temperature measurement as with the actual practices, introduced by the glass manufacturer Gabriel Daniel Fahrenheit (1686-1736) and the aristocrate and biologist René-Antoine Ferchault de Réaumur (1683-1757). Later the reversion of the Celsius scale with 0 as the frozing point and 100 as the boiling point of water was introduced, and with this modification it became widely spread.
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More on this Website >
• http://www.surveyor.in-berlin. ... /Bios/Celsius-e.html
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Giovanni Cassini, Astronomer
Giovanni Domenico Cassini studied mathematics and astronomy at the Jesuits and became professor of astronomy at Bologna, as well as fortress builder, at age 25. There, he... |
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Fahrenheit, Inventor Thermometer
Daniel Gabriel Fahrenheit, German physicist and instrument maker. He spent most of his life in the Netherlands, where he devoted himself to the study of physics and the m... |
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