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Galileo Thermometer. Floating multi-colored spheres suspended in a glass tube in a cherry wood frame stand. What a functional and intriguing gift. Galileo Thermometers add character and charm to any home or office. Developed by Galileo Galilei (1564-1642) this thermometer is based on the law of physics.

As the temperature rises, the liquid expands. Its specific gravity decreases and the spheres sink. The current temperature is indicated by the lowest floating glass sphere in cylinder.