Experience the captivating qualities of the Galileo Thermometer based on the discoveries of Italian scientist- Galileo Galilei. The elegant- liquid-filled glass cylinder holds seven weighted glass balls that are filled with intensely colored liquid. Each glass ball has an attached metal temperature tag and floats or sinks according to the current temperature. This fascinating method of measuring temperatures can help you relax during a long and stressful day. The Galileo Thermometer - 15 inch will enhance your workspace and is a great conversation piece for the office.