Based upon the definitions of the Centigrade scale and the experimental evidence that absolute zero is -273.15ºC
The Newton scale was devised by Isaac Newton. He defined the "zeroth degree of heat" as melting snow and "33 degrees of heat" as boiling water. His scale is thus a precursor of the Celsius scale, being defined by the same temperature references. Thus the unit of this scale, the Newton degree, equals 100⁄33 kelvin or degrees Celsius and has the same zero as the Celsius scale.