Student Education Repository (மாணவர்கள் கல்விக் களஞ்சியம்): Today (24 May 1686) Birthday of Daniel Gabriel Fahrenheit, German physicist who invented the mercury-glass thermometer.

Monday, May 24, 2021

Today (24 May 1686) Birthday of Daniel Gabriel Fahrenheit, German physicist who invented the mercury-glass thermometer.

Today (24 May 1686) Birthday of Daniel Gabriel Fahrenheit, the German physicist who invented the mercury-glass thermometer.

Daniel Gabriel Fahrenheit was born on 24 May 1686 in the Danish-Lithuanian Commonwealth of Danzig. But most of his life lived in the Dutch Republic. Fahrenheit is a German Heinz business family. They lived in several Hanseatic cities. Fahrenheit's grandfather lived in Rostock. Daniel's grandfather moved from Nieuhoff to Danzig in Konigsberg and settled in 1650 as a merchant. His son, Daniel Fahrenheit (father of Daniel Gabriel), is married to Concordia Schumann, a prominent Danish business family. Daniel is the eldest of five Fahrenheit children (two sons and three daughters) who survived childhood. After the death of his parents on 14 August 1701, Daniel Gabriel began training as a merchant in Amsterdam. However, Fahrenheit's interest in natural sciences led him to begin studies and experiments in the field.

Since 1717, he has travelled to Berlin, Halle, Leipzig, Dresden, Copenhagen and his hometown. His brother still lived there. At that time, Fahrenheit met Ole Romer, Christian Wolff, and Gottfried Leibniz. In 1717, he built a glass mouthpiece, barometers, altimeters, and thermometers at the Fahrenheit Hague. From 1718, he lectured on chemistry in Amsterdam. He visited England in 1724. He was elected Fellow of the Royal Society in the same year. Since August 1736, Fahrenheit has been staying at Johannes Frisleeven in Plein Square in The Hague on the application for a patent in the states of Holland and West Friesland.

According to Fahrenheit's 1724 article, he determined his size by referring to the three fixed temperature points. The lowest temperature was achieved by preparing a mixture of ice, water, and salt ("ammonium chloride or sea salt") and waiting until the eutectic system reached equilibrium temperature. The thermometer was then placed in the mixture, allowing the fluid in the thermometer to descend to its lowest point. The reading of the thermometer is taken as 0 ° F. As the ice formed on the surface, it was still placed in the water. The second reference point, 30 ° F, was selected as the reading of the thermometer. The third calibration point, taken at 90 ° F, was selected as the thermometer's reading when the instrument was placed in the hand or mouth.

Fahrenheit came up with the idea that at this temperature level, Wednesday will boil about 300 degrees. The work of others shows that it boils water 180 degrees above its freezing point. The Fahrenheit criterion was later redefined to make the freezing-boiling interval exactly 180 degrees, a convenient value as 180 is a very mixed number, which means it is evenly divided into fractions. Because of the redefinition of size, today's average body temperature is taken to be 98.2 degrees. Whereas it was 96 degrees Fahrenheit at its original level. The Fahrenheit criterion was the primary temperature standard for climate, industrial, and medical purposes in English-speaking countries until the 1970s. Nowadays, the rest of the world, except the United States, has been replaced by the Celsius scale. Temperature and weather reports are still being broadcast in Fahrenheit.

In 1917 he invented the mercury-glass thermometer. He is best known for his invention of the Fahrenheit temperature unit. His name is named Fahrenheit Temperature Unit. In early September 1736, he fell ill. On the 7th, his health deteriorated. He had come to Notary Willem Ruizbrook to draw his will. On the 11th, the notary again made some changes. Five days later, on September 16, 1736, at the age of 50, he left the world at Gloucester in The Hague. Four days later, he attended the Fourth A class funeral home in Gloucester, Hague.

Source By: Wikipedia

Information: Ramesh, Assistant Professor of Physics, Nehru Memorial College, Puthanampatti, Trichy.