This beautiful Galileo Thermometer is both a stunning ornament and a carefully calibrated piece of scientific equipment. The Galileo thermometer was invented during the 17th Century by Galileo, a famous Italian scientist and astronomer, and consists of attractive weights suspended in a clear, liquid filled cylinder. Galileo discovered that the specific gravity of liquids change as they expand at different temperatures. As the thermometer rises the liquid expands - its specific gravity decreases and the weights sink. This Galileo thermometer shows both Celsius and Fahrenheit on the alternate sides of the weights. ..................10% OFF WHEN YOU SPEND OVER £50: USE CODE xmas10 IN CHECKOUT
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