He chose the freezing point of a certain salt-water mixture for zero. He used the freezing point of water for 32 degrees. And body temperature he called 96 degrees. Why the funny numbers? He originally used a twelve-point scale with zero, four, and twelve for those three benchmarks.
Then he put eight gradations in each large division. That's how he got that strange 96 number -- it was eight times twelve. Body temperature is actually a tad higher than 96, but it was close. Later, Fahrenheit made mercury thermometers that let him use the boiling point of water instead of human body temperature for the high mark.
Fahrenheit was still only 28 when he startled the world by making a pair of thermometers that both gave the same readings. No one had ever done that before. Subscribe to the Newsletter Name Email. Important disclaimer information about this About site. Depression Self-Test Vitamins for Depression? Most Popular Articles. Latest Articles. See Online Courses. FREE Newsletter. Sign Up Now! All Topics Email Article.
All rights reserved. Early History The first thermometers were called thermoscopes and while several inventors invented a version of the thermoscope at the same time, Italian inventor Santorio Santorio was the first inventor to put a numerical scale on the instrument. Galileo Galilei invented a rudimentary water thermometer in which, for the first time, allowed temperature variations to be measured.
In , Gabriel Fahrenheit invented the first mercury thermometer, the modern thermometer. English physician, Sir Thomas Allbutt invented the first medical thermometer used for taking the temperature of a person in This scale was based on a scale of zero to one hundred where the freezing point of water is zero, the boiling point of water is degrees and normal body temperature is 37 degrees.
The first real medical thermometer was invented by Sir Thomas Allbut in For almost a hundred years thermometers were basically unchanged. They contained alcohol or mercury and were considered to be very accurate.
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Click here for medical thermometers, including animal health products. Please contact us if you have a specific order or enquiry not listed above. Search for:. The thermoscope The predecessor to the thermometer — the thermoscope — is a thermometer without a scale; it indicates differences in temperature only i.
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