A distinctive ornamental (but functional) thermometers utilising 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. This model is mounted in a wooden frame and includes a quartz clock (battery supplied). Measures 18" tall.