ocr: d'Arezzo. Leonardo also theorizes that heat - generated from the center of the earth would affect the levels of the oceans. He imagines a glass model'of the earth as a - stillA to explain how the condensation of water is a 'downward process. - B Next Leonardo poses a riddle in his description of distillation. The diagrams ofinverted glass flasks Cand the accompanyig text D describe what happens when a burning coalis placed inside a vessel inverted over water. In the ancient version of this experiment, described
