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Weather Diary  15 August 1761 The Farhrenheit Temperature Scale.Still image:
Size: 3872 x 2179
Acquisition: Graphic, Scanned illustration
Frame rate: still
Clearance: No releases required
Location: Massachusetts
License: Royalty Free
Usage: Creative and Editorial
Point of view: Ground in scene
Geography: Rural
Still images available: Y
Keywords:   Conventional Instruments, Thermometer, Daily weather diary, Cold, Heat, August Weather Events, Weather History
Asset ID: 5522
Title: Weather Diary 15 August 1761
Concept: The Farhrenheit Temperature Scale.
Detail: Harvard University's President Holyoke decreed that the Fahrenheit temperature scale would become the standard for his institution. This paved the way for the United States thermometers to be in Fahrenheit while most of the world adopted the more scientifically sensible centigrade or Celsius temperature scale. At this time the United States remains the only major nation that is still using the Fahrenheit scale. Incidentally, legend has it that Professor Fahrenheit developed his scale by using two "bench marks", acquired in the following way. On a day in Paris in which he felt marked the the lowest possible temperature, he notched the column of mercury on his thermometer at what we now call "0 degrees". To get a consistent upper limit for his temperature scale, he used is own body temperature. This is how we know that he apparently had a slight fever oh the day that he etched "100 degrees F" on his first crude thermometer. On the other hand Celsius used the boiling and freezing points of water as much more representative, and physically repeatable bench marks. He then logically divided the interval between them into 100 degree units Of 1C each.

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