Medium Galileo Thermometer.
Galileo discovered this fascinating method by placing several exactly weighted balls in a cylinder filled with a certain liquid. He discovered this fascinating method. He placed several exactly weighted balls in a cylinder filled with certain liquid. He found that the balls rose or fell according to the current temperature. By this method he was able to determine the correct temperature. When the temperature rises the liquid in the glass cylinder becomes less dense, and heavier balls sink slowly to the bottom.
7.9 x 7.9 x 39.6 cm