Celestia 40cm Wireless Thermometer

These distinctive ornamental (but functional) thermometers utilise 17th century astronomer Galileo galilei's discovery that the density of liquids varies with temperature. Carefully weighted glass globes are suspended in a liquid-filled tube, where they sedately sink or float as the surrounding air gets hotter or colder. Temperature is indicated by the engraved brass tag on the lowest floating globe. 7-Globe models are 43 cm tall. Temperature is shown in Celsius.