Grado Newton

The Newton scale is a thermometric scale developed by Isaac Newton around the year 1700. Thinking about the heat problem, Newton first developed a qualitative scale from about twenty points, ranging from "cold air in the winter "to" the burning coals in the kitchen hearth ". This method was coarse and problematic, so Newton was soon dissatisfied. Knowing that most of the substances expand with heat, Newton used a vessel with linseed oil and measured the change in volume with respect to its points. He found that the volume of linseed oil increased 7.25% by heating it from the temperature at which the snow melts to the temperature at which the water boils.

Later, Newton defined the "zero degree of heat" as the temperature at which the snow melts, and "33 degrees of heat" as the boiling temperature of the water. In this way, its scale would be precursor to the Celsius scale, which is also defined using freezing and boiling water temperatures as benchmarks. Anders Celsius probably knew Newton's thermometric scale when he invented his. Therefore, the unit of this scale, the Newton degree, is equivalent to 100 33 {\displaystyle {\tfrac {100}{33}}} (about 3.03) kelvins or degrees Celsius and has the same zero of the Celsius scale.

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