This thermometer is based on a scientific principal discovered by Galileo. As the liquids in the cylinder contract slightly at higher temperatures, the spheres of slightly different weights rise; as the liquids cool, the spheres drop. The lowest floating sphere in the upper part of the cylinder tells the correct temperature, from 64 to 96 degrees, in 4-degree increments. Made of glass, the galileo thermometer is an attractive and fascinating way to measure the temperature of your home.
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