Galileo Thermometer

The Galileo thermometer consists of a sealed glass tube that is filled with water and several floating 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 degrees symbol are engraved on these calibrated counterweights. The bubble that sinks the most indicates the approximate current temperature.

Specifications:
Range: 64 to 80 degrees Fahrenheit
Length: 13"