One of my co-workers has an interesting thermometer on his desk. It is a glass tube with different-colored floating things in it. What kind of thermometer is this, and how does it work?
Galileo Glass Indoor Thermometer 17 Inch
Check the Temperature in Style! Our Galileo Thermometers are available in many different sizes of the classic shape. Please see other listings for
Classic Galileo Thermometers
How does a Galileo glass thermometer work? - Quora
How does a Galileo thermometer work?”
* This gorgeous Galileo thermometer is a work of art with blown glass balls of varying colors in a delicate blown glass cylinder * The glass balls