Galileo thermometer
Thermometer containing several glass vessels of varying density
Galileo thermometer
A Galileo thermometer (or Galilean thermometer) is a thermometer containing a clear liquid and several glass vessels of varying density. The individual floats rise or fall in relation to their respective density and the density of the surrounding liquid as the temperature changes. It is named after Galileo Galilei because he discovered the principle on which this thermometer is based—that the density of a liquid changes in relation to its temperature.
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