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Did you know that initially the boiling temperature of water was set at 0 degrees, while the freezing point was set to 100? Jean-Pierre Christin, a French physicist born today in 1683, reversed that scale into one we recognize today. In 1742 he published a research paper that showed the design of a thermometer. On that thermometer, the “Thermometer of Lyon” 0 degrees represented the freezing point of water and 100 degrees represented the boiling point of water, a scale that we continue to use today.

We hope that you have a steady day at school today. Remember to think kind thoughts, use kind words, and do kind things. We Love You.


Bonus Facts:
Jean-Pierre Christin was also an astronomer, mathematician, and musician.

Jean-Pierre Christin was just one of many scientists that independently developed a scale for measuring temperature. Around the same time, Carolus Linnaeus also developed a thermometer with the same scale as Jean-Pierre Christin’s.

One of the Thermometers of Lyon is kept at the Science Museum in London.