The 17-inch Galileo Thermometer employs the principles of buoyancy and density. The body of the thermometer is filled with parrafin oil and air, allowing the parrafin to expand and contract as needed. This isolates it for air pressure which can affect the density of liquids. As the temperature of the parrafin falls, it becomes denser, and the colored baubles inside will rise. Each bauble is carefully weighted so it will fall at a particular temperature. By noting the lowest floating bauble, you can read the current temperature, between 60 and 96 degrees Fahrenheit.

The Galileo Thermometer is named after Galileo Galilei to honor his discovery of the principles of buoyancy and density, on which this thermometer is based. 

• 17 inch tall glass reproduction of Galileo’s original thermoscope
• Provides accurate reading of temperature between 60 and 96 degrees Fahrenheit
• Works according to the principles of buoyancy and density
• Based on the design of Galileo Galilei

WARNING: Contains flammable material. Do not expose to extreme heat or open flame.