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 with Goethe Barometer

Cylindrical thermometer and barometer set; inspired by Galileo's instruments Interprets temp and weather based on principles of buoyancy and air

AcuRite 00795A2 Galileo Thermometer with Glass Globe Barometer, Barometer Set, Glass/Wood, 3

Funtime GiftsGalileo Thermometer

Simple Ways to Read a Galileo Thermometer: 8 Steps (with Pictures)

Instructions for a Galileo Thermometer

EASY READ 23 Tall Galileo Thermometer

Galileo thermometer

Solved A Galileo thermometer consists of a cylinder filled

AstroMedia Weather station The Galileo Thermometer

13 Tall Galileo Thermometer / Fitzroy Storm Glass Combo Unit

DHT31 - Galileo Thermometer

Large 44cm tall Free standing Galileo thermometer Sale Gift