Large 17" Tall Colorful Galileo Desktop Thermometer Made in Germany For Sale

This thermometer is based on a scientific principal discovered by Galileo. As the liquids in the cylinder contract 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. Fahrenheit on one side of the hanging plaques, centigrade on the reverse. Made of glass, it's an attractive and fascinating way to measure the temperature of your home. Measures 17" tall x 3-1/4" in diameter.Never used. Box is in fair shape.