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Galileo Glass Blown Thermometer 18cm
A fun way to tell the temperature by using the floating glass spheres.
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Why we love it: These are top quality blown glass thermometers that will amaze and educate your friends and family alike Back in the 17th Centery Galileo, the famous Italian astronomer, discovered that the density of water changes according to temperature. This thermometer indicates the current temperature by the movement of the glass spheres rising and falling in the column. As the temperature rises, spheres descend one by one and those above ambient temperature are left floating at the top of the fluid.The temperature is indicated by a number hanging from the bottom of each sphere and the lowest sphere still floating shows the actual room temperature.
What you need to know: Size 18cm Made from genuine blown glass
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