Seller: thescienceco (9,488) 99.6% , Location: Denver, Colorado, Ships to: Worldwide, Item: 271141372858 thescienceco Store Glass Galileo Thermometer, 13 inch German Crafted Glass Galileo Thermometer, 13 inch German Crafted Temp. Range: 64° to 80° F Number of Balls: Five Height: 13" (340mm) Diameter: 2" (50mm) T With the beautiful floating glass spheres indicating room temperature. This German handcrafted thermometer uniquely demonstrates the scientific principle established by Galileo in the 17th century that a liquid's density changes with the temperature. The colorful glass spheres, with their temperature tags, rise one by one as the liquid temperature rises and descend as temperature falls. The lowest sphere among those at the top indicates the temperature. Read the Wikipedia article for more detailed information about how the Galileo thermometer works. (Link opens new window.) This 13" Fahrenheit Galileo thermometer has seven spheres for temperatures 80°, 76°, 72°, 68°, 64°. Please call 800-372-6726 or email with any questions.If you are ordering multiple items from us, please allow us to send an invoice before payment is made. This is so we can offer combined shipping for you. Also be sure to check out all our other science related auctions as well as our new science store!. We have a variety of kits, labware, glassware and testing equipment. We also have microscopes, both digital and optical. We are adding new items almost daily!!