This intriguing work of art is a thermometer based on a principal discovered by Galileo Galilei (1564-1642). The pioneer of modern physic and astronomy invented a liquid filled glass thermometer containing colored floating spheres of different weight. The lowest floating sphere in the upper part of the cylinder tells the correct temperature. The 12" tall glass thermometer measures temperatures from 64-80 degrees Fahrenheit. The five spheres are marked with 4 degrees of graduation.
Spheres are red, orange, blue, green and deep purple; all floating in clear liquid. Practical and a pleasure to contemplate!