Thermoscope
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A thermoscope is a device that shows changes in temperature. A typical design is a tube in which a liquid rises and falls as the temperature changes. The modern thermometer gradually evolved from it w
Galileo thermoscope, The Musée des Arts et Métiers, Paris
Galileo thermometer
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A Galileo 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 densit
Thermoscope
…similar in 1638. In 1701 Ole Christensen Rømer effectively invented the thermometer by adding a temperature scale (see Rømer scale) to the thermoscope. Galileo thermometer Tasimeter…
A Celsius Galilean thermometer in two degree gradations. A risen orange orb denotes 24 °C.