Descending Water and the Current in an Elbow Channel
How far descending water a b rises again in b c, and how a current changes where a channel bends.
Red-chalk sketches show channels branching and bending. One note letters a path a b c and asks how high the water a b, once it descends, will rise again in b c. A second considers an elbow channel, asking how the current varies in a channel of uniform width, depth and slope that bends at an angle. Further faint red-chalk text is present on the sheet beyond the brief lines transcribed here.
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How high descending water rises again
The path is lettered a b c. Leonardo asks: the water a b that descends, how high will it rise in b c? The question weighs the fall against the rebound of the water.
The current in an elbow channel
For a channel of uniform width, depth and obliquity that bends at an angle, Leonardo asks how the current varies at the elbow. The bend itself is the object of study.