Page "Anders Celsius" Paragraph 8

Celsius was the first to perform and publish careful experiments aiming at the definition of an international temperature scale on scientific grounds.

In his Swedish paper " Observations of two persistent degrees on a thermometer " he reports on experiments to check that the freezing point is independent of latitude ( and of atmospheric pressure ).

He determined the dependence of the boiling of water with atmospheric pressure which was accurate even by modern day standards.

He further gave a rule for the determination of the boiling point if the barometric pressure deviates from a certain standard pressure.

He proposed the Celsius temperature scale in a paper to the Royal Society of Sciences in Uppsala, the oldest Swedish scientific society, founded in 1710.

His thermometer was calibrated with a value of 100 ° for the freezing point of water and 0 ° for the boiling point.

In 1745, a year after his death, the scale was reversed by Carl Linnaeus to facilitate more practical measurement.

Celsius originally called his scale centigrade derived from the Latin for " hundred steps ".

For years it was simply referred to as the Swedish thermometer.