Galileo Thermometer - Celsius - 13 inches

 

Galileo Thermometer - Celsius. The Galileo thermometer consists of a sealed glass tube that is filled with water and several gloating bubbles. The bubbles are glass spheres filled with a colored liquid mixture. Attached to each bubble is a little metal tag that indicates a temperature. A number and degree symbol are engraved on these calibrated counterweights. The bulb that sinks the most indicates the approximate current temperature. 13 inches in length.