Labels:text | screenshot | font OCR: Leonardo works on water current control on this page. He intends to deal with the problem through the placement of various engineered obstacles to redirect flow. Around 1508 the king of France, Louis XII, allowed Leonardo to use a section of the Naviglio Grande Canal in Milan for his hydraulic experiments. Leonardo sketches complex sets of obstacles in the margins. A This series of geometric shapes includes a note expressing a desire to establish a structured study of ways to avoid erosion: "The science of these objects is of
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