Glass Galileo Thermometer, H: ca. 28 cm, in gift box - This is a very special thermometer invented by Galileo Galilei between 1593 and 1603. The sphere suspended in the liquid falls down when the temperature rises as the density of the liquid carrying the sphere decreases. Conversely, the density increases when the temperature decreases, so the sphere rises. The glass galileothermometer brings style, design and functionality into your own four walls. Glass Thermometer / Galileo Thermometer / Home Decor / Weather Forecast / Gift Idea / Scientific Instrument / Desktop Decor / Temperature Gauge / Educational Gift / Bestseller Item