Labels:text | screenshot | font OCR: While not directly concerned with the body of the earth theme, Leonardo's considerations here are much clearer if we keep in mind that the four elements are essential to theories of the macrocosm. Leonardo explores the interrelationships of three of the four elements-air, water, and fire-both visually and through thought experiments. He begins with a simple observation on the pattern of surface waves in a bowl of water. The last example on the page concerns not water, but air.
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