Category:Water thermometer

Wa"ter ther*mom"e*ter. (physics)

Defn: a thermometer filled with water instead of mercury, for Ascertaining the precise temperature at which water attains its Maximum density. This is about 39º fahr., or 4º centigrade; and from That point down to 32º fahr., or 0º centigrade, or the freezing Point, it expands.