degrees celsius symbol

ºC means degree Celsius and not degree centigrade?

By the middle of the 17th century, sensitive thermometers were available, but there was no serious attempt to establish a universal scale for the measurement of temperature since there was not even a clear scientific knowledge of what it itself was. In 1669, Father Honoré Fabryen Leyde calibrated his thermometers, first “putting them on ice” and […]

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