Durac Galileo Thermometers, Thermometers with colorful spheres which rise and fall to indicate temperature, Each

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Galileo Galilei discovered when a liquid's temperature increases, it's density decreases. His findings inspired these unusual and interesting thermometers.Decorative functional thermometer is a great conversation piece perfect for the home or officeSealed glass cylinder contains a clear liquid and several glass spheres of varying densities that individually rise or fall to indicate temperatureTag on the lowest sphere in the top group indicates the current temperatureCurrent temperature is indicated by lowest sphere in the top groupIndividually calibratedAccuracy: ±2°C or ±4°FMade up of glassIndividually packaged