Daniel Fahrenheit

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About Daniel Fahrenheit
Daniel Gabriel Fahrenheit (14 May 1686 – 16 September 1736) was a physicist and engineer who determined a temperature scale now named after him.Biography Fahrenheit was born in 1686 in Gdańsk (German: Danzig), Royal Prussia, a province of the Polish-Lithuanian Commonwealth, but lived most of his life in the Dutch Republic. The Fahrenheits were a Hanse merchant family who had lived in several Hanseatic cities. Fahrenheit's great-grandfather had lived in Rostock, and research suggests that the Fahrenheit family originated in Hildesheim. Daniel's grandfather moved from Kneiphof (Knipawa) (in Königsberg (Królewiec)) to Danzig and settled there as a merchant in 1650. His son, Daniel Fahrenheit (the father of the subject of this article), married Concordia (widowed name, Runge), daughter of the well-known Danzig business family of Schumann. Daniel Gabriel was the eldest of the five Fahrenheit children (two sons, three daughters) who survived childhood. His sister, Virgina Elisabeth Fahrenheit, married Benjamin Ephraim Krueger of a patrician family of Danzig. At age 16, Daniel Gabriel Fahrenheit began training as a merchant in Amsterdam after his parents died in 1702 from accidentally eating poisonous mushrooms. However, Fahrenheit's interest in natural science caused him to begin studies and experimentation in that field. From 1707, he traveled to Berlin, Halle, Leipzig, Dresden, Kopenhagen, and also to his hometown, where his brother still lived. During that time, Fahrenheit met or was in contact with Ole Rømer, Christian Wolff, and Gottfried Leibniz. In 1717, Fahrenheit settled in The Hague with the trade of glassblowing, making barometers, altimeters, and thermometers. From 1718 onwards, he lectured in chemistry in Amsterdam. He visited England in 1724 and became a member of the Royal Society. Fahrenheit died in The Hague and was buried there at the Kloosterkerk (Cloister Church). According to Fahrenheit's 1724 article, he determined his scale by reference to three fixed points of temperature. The lowest temperature was achieved by preparing a frigorific mixture of ice, water, and ammonium chloride (a salt), and waiting for it to reach equilibrium. The thermometer then was placed into the mixture and the liquid in the thermometer allowed to descend to its lowest point. The thermometer's reading there was taken as 0 °F. The second reference point was selected as the reading of the thermometer when it was placed in still water when ice was just forming on the surface. This was assigned as 32 °F. The third calibration point, taken as 96 °F, was selected as the thermometer's reading when the instrument was placed under the arm or in the mouth.

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Poland Scientists & Academicians Ranking

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Rank Name Total
1. Marie Curie 19012
2. Mikołaj Kopernik 2680
3. Daniel Fahrenheit 411
4. A. Wolszczan 81
5. Jan Hevelius 71

Scientists & Academicians Ranking

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Rank Name Total
117. Benjamin Franklin 445
118. Sergey Korolyov 442
119. G. Madhavan Nair 420
120. Nassim Nicholas 411
121. Daniel Fahrenheit 411
122. Louis Pasteur 408
123. Ibn Battuta 408
124. Biruni 407
125. Da Vinci 406

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