Mercury-in-glass thermometer related to the rapid cooling (and contraction) of the glass. When Celsius decided to use his own temperature scale, he originally defined his scale "upside-down", i.e. he chose to set the boiling point of pure water at 0 °C (212 °F) and the freezing point at -100 °C (-32 °F). One year later, Frenchman Jean-Pierre Christin proposed to invert the scale with the freezing point at and the boiling point at . He named it Centigrade (100 grades). Finally, Celsius proposed a method of calibrating a thermometer: These points are adequate for approximate calibration but both vary with atmospheric pressure.
Gabriel Daniel accuracy, Daniel had the advantage of consulting valuable original sources. His "Histoire de la milice française", etc. (1721) is superior to his "Histoire de France". Daniel also wrote a reply to Pascal's "Provincial Letters", entitled "Entretiens de Cleanthe et d'Eudoxe sur les lettres provinciales" (1694); two treatises on Descartes' theory as to the intelligence of the lower animals, and other works. Gabriel Daniel Gabriel Daniel (8 February 1649 – 23 June 1728) was a French Jesuit historian. Born in Rouen, he was educated by the Jesuits, entered the order at the age of eighteen, and became superior at Paris. He