What's a Galileo thermometer and how do you read it?
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HOW DOES A GALILEO THERMOMETER WORK, AND HOW TO READ IT
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Galileo Glass Thermometer with Blue Floating Globes Home/Office Table Decor EUC | eBay
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Simple Ways to Read a Galileo Thermometer: 8 Steps (with Pictures)
Galileo Thermometers – How they work and how to read them. | Spectrum Scientifics' Store Blog