Aquarium Floating Thermometer with Suction Cup Accurate Fish Tank Glass Wall Simple Quick Reading Thermometer for Fish Farming|Fish & Aquatic Supplies Parts| - AliExpress
Galileo thermometer - Wikipedia
Where did the Galileo thermometer get its name from? | Royal Meteorological Society
Galileo-style glass thermometer with ten multicolored floating balls. Product: ThermometerConstruction Material:… | Galileo thermometer, Fun accessory, Thermometer
Floating Thermometer
How does a Galileo thermometer work? | HowStuffWorks