14 1 2" Floating Colorful Galileo Sphere Thermometer
Galileo Thermometers are designed to add character and charm to any home or office environment and make an attractive gift. Everyone can appreciate the simple beauty of colorful orbs floating in a glass cylinder. Developed by Galileo (1564 1642) this thermometer is based on the law of physics which states: "The specific gravity of liquids change as they expand at different temperatures." The thermometer consists of a 14 1 2" sealed glass tube that is filled with water and a number of floating spheres. The glass spheres are filled with a colored liquid and float up and down according to changes in the temperature. When the temperature rises the spheres will sink and inversely when the temperature falls the spheres will rise due to changes in the specific gravity of liquids. You always read the lowest of the floating temperature tags to determine the correct temperature. How does it work Galileo thermometers use a specific density principle first understood by Galileo (1564 1642) the famous Italian inventor scientist philosopher and astronomer. When the temperature rises the spheres will sink and inversely when the temperature falls the spheres will rise due to changes in the specific gravity of liquids. Remember to always read the lowest of the floating temperature tags to determine the correct temperature. Attached to each bubble is a little metal tag that indicates a temperature. A number and degree symbol are engraved in the tag. After the weighted tags are attached to the bubbles each differs very slightly in density (the ratio of mass to volume) from the other spheres and the density of all of them is very close to the density of the surrounding water. As the temperature of the air outside the thermometer changes so does the temperature of the water surrounding the bubbles. As the temperature of the water changes it either expands or contracts thereby changing its density. So at any given density some of the bubbles will float and others will sink. The bubble that sinks the most indicates the approximate current temperature. 14 1 2" Floating Colorful Galileo Sphere Thermometer Features: * Hand blown glass * Multi colored temperature spheres * Five temperature spheres * Gold plated tags * Highly educational and entertaining * A fantastic gift for the person who is hard to buy for * Becomes a conversational piece.
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