What's a Galileo thermometer and how do you read it?

While it's not the most precise instrument, it's certainly one of the most attractive.

Galileo Thermometer Shop 17-Inch Galileo's Thermometer For Your

How does a Galileo Thermometer work? – Klockit

Galileo thermometer demonstration

Galileo Thermometer - InstrumentationTools

Galileo thermometer - Wikipedia

Galileo Thermometers – How they work and how to read them

Buy Multicolor Galileo Thermometer with Floating Balls, Weather

How does a Galileo thermometer work?”

Instructions for a Galileo Thermometer

EASY READ 23 Tall Galileo Thermometer

Large 44cm Tall Free Standing Galileo Thermometer in Gift