How does a Galileo thermometer work?

Product Description

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?

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Thick, sturdy mouth-blown glass construction with solid pine wood base, 11-inch glass Galileo thermometer, Colorful, liquid filled bulbs descend and

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SCIENCE MEETS ART: The Galileo Thermometer is an example of utilizing scientific principle to create a useful artistic piece for day-to-day use.

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Solved A Galileo thermometer consists of a cylinder filled

Galileo Thermometer, Hobby Lobby

A little background and instruction on the curious device known as