Object of precision The original Delisle thermometer that Celsius marked with his 100-degree scale. (Courtesy: Museum Gustavianum, photograph by Mikael Wallerstedt) On Christmas Day in 1741, when ...
Building a thermometer is a matter of precise technology—putting just the right amount of mercury into a specially designed glass tube, for instance—but determining which numbers to use on the ...
Many engineering fields in the U.S., especially high-tech ones, also use the kelvin and degrees Celsius scales. However, the United States is the last major country in which the degree Fahrenheit ...