Zeckos Glass Galileo Thermometer With 11 Colored Floating Vessels

22 in. High, 2.25 in. Diameter. 3 1/2 in. Diameter Base. Made From Glass/Colored Liquid. Glass Bubbles Float According to Temperature. Makes a Fun, Decorative Conversation Piece. This thermometer is based on a thermoscope invented by Galileo Galilei in the early 1600s. It`s made from a clear glass 22-inch (55 cm) high, 2.25-inch (6 cm) diameter liquid-filled, sealed glass tube with a 3.5-inch (9 cm) diameter base, and 11 colored liquid-filled floating glass bubbles. A metal tag engraved with varying degrees is attached to each bubble acting as a counterweight for temperature readings as the bubbles rise and float with the changing temperatures. The bubble floating in the gap between those at the top and bottom indicates the ambient temperature. It makes a wonderful gift for science buffs or those that like really cool things, and a fun conversational piece for your own home or office!