French physicist Jean-Pierre Christin published the design of a mercury thermometer using the centigrade scale with 0 representing the melting point of water and 100 its boiling point.
Available at : Annales des sciences physiques et naturelles, d'agriculture et d'industrie
By Société d'agriculture, sciences et industrie de Lyon. via @googlebooks
Anders Celsius published his research at Abhandlungen über thermometrie, von Fahrenheit, Réaumur, Celsius, (1724, 1730-1733, 1742)
Hrsg. von A.J. von Oettingen.
@gutenberg_org@internetarchive surprising to our habituation that it was not that long ago there were no standards for temp and weights, they being so important for science with mathematics the every perplexing answers to wights i.e. charge density
all using arbitrary unites , and some resorting to complicate division atomic particles
Historical note:
1742 Anders Celsius invented the Celsius temperature scale. In its original form the scale had 0 degrees for the boiling point of water and 100 degrees for its freezing point.
1743 The scale was changed by Jean Pierre Christin so that 0 degrees is the freezing point of water and 100 degrees is its boiling point.
@gutenberg_org
as we know the melting point of water a bit of a variable region depending on atmospherics pressure and water levels water as a solid is a non conducting crystal and grows like all crystals by charge density in a {positive} {negative} matrix thus even the time of day temperature changes the magnetic properties of the atmosphere particulate matter well done Prof Fournet.
In his paper Observations of two persistent degrees on a thermometer, Christin recounted his experiments showing that the melting point of ice is essentially unaffected by pressure. He also determined with remarkable precision how the boiling point of water varied as a function of atmospheric pressure. He proposed that the zero point of his temperature scale, being the boiling point, would be calibrated at the mean barometric pressure at mean sea level.
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