RAINDROP GALILEO THERMOMETER
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This glass Galileo Thermometer displays the approximate temperature and is interesting home décor item.
Galileo thermometers work on the principle of buoyancy, which determines whether objects float or sink. As the temperature changes, the glass balls will either sink to the bottom (temperature rises) or float to the top (temperature falls). At higher temperatures (greater than 26°C), all the balls will sink to the bottom of the cylinder. If the temperature drops below 18°C, then all the glass balls will be floating at the top of the thermometer, so the thermometer can only really be used indoors.
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