synonymWarren Haidt(German physicist) generally refers to Daniel Gabriel Wallenheit
Daniel Gabriel Wallenheit (May 14, 1686 - September 16, 1736),physical scientist, engineer, German (although he settled in Holland),Fahrenheit scaleFounder of.
Warren Haidt was born inDanze(TodaypolandGdansk）When he was a teenager, his parents died unexpectedly, forcing Warren Haidt to start studying business.AfterAmsterdamAfter years of training, he settled downHague, engaged in the blowing and trading of glassware, and made barometers, altimeters and thermometers for sale, successively developed alcohol andMercury thermometer。After 1718, he taught physics in Amsterdam. In 1724, he becameRoyal Societyacademician.Warren Haidt confirmed for the first time in the history of physicsliquidOfboiling pointThey are generally the same, but they will change with the change of air pressure. The higher the air pressure, the higher the boiling point. On this principle, a boiling point altimeter was invented.
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In the process of making the thermometer, Wallenheit had to find a way to accurately mark the temperature, so he used three temperatures that were very important under the technical conditions at that time as the basis for marking the scale.First, he combined water, ice andammonium chlorideMix, reach the lowest temperature that can be recorded at that time, and set it as 0 ℃.Then he set the freezing point of water at 32 degrees, and finally set the human temperature at 96 degrees.
Soon after the adoption of a mercury thermometer capable of withstanding higher temperatures, Wallenheit changed the boiling point of water as the upper limit of the thermometer to 212 degrees, so that he could divide the ice point and boiling point of water into 180 degrees, and at the same time make the body temperature close to the integer 100.Before the Celsius scale was widely accepted, the Fahrenheit scale was the most accepted measure of temperature.Today, Americans still use the Fahrenheit scale in their daily life, which has been gradually abandoned in Britain and other places.
