Decorative 11-inch Glass Galileo Thermometer by La Crosse replicates a centuries-old design based on the law of physics. It operates on the principle that as the density of a liquid fluctuates with temperature changes, the floating weighted bulbs will rise or fall detecting the current temperature. It is a functional, yet decorative conversation piece and will enhance any home or office. Blown-glass bulbs are filled with a colorful liquid dye and attached with metal temperature identification tag that displays the current degree. Working with German artisans, we’ve designed the perfect combination of form and function in this 11-inch tall glass cylindrical thermometer, brought to you by La Crosse!