Collision of water masses; a crescent-shaped bed and river bends
A circular inflow scours a lunar hollow; where a bend erodes bed and banks
A large pen drawing of masses of water meeting and breaking into froth dominates the leaf. The notes reason that a circular inflow hollows a crescent-shaped bed that gathers gravel between its two horns, and ask, at an elbow of the current, whether the water scours the bottom, middle or top, how the following leaps erode banks of uniform material, and where sediment is lifted and deposited. A small symmetrical scroll ornament with short untranscribed labels is drawn at the lower right.
On this page
Circular water-entry makes a crescent-shaped bed
Where water enters the pool in a circular figure, its bed hollows into a crescent (lunar) concavity. That hollow gathers gravel between the two horns of the shape.
Where a river's bend scours the bed and banks
At an elbow of the current Leonardo asks whether the water scours the bottom, the middle or the top. He also asks how the leaps that follow erode banks of uniform material, and where the flow lifts and deposits sediment.
Masses of water meeting and breaking
A large pen drawing shows masses of water meeting and breaking into froth and spray. It illustrates the impact and rebound discussed in the surrounding notes.
Scrollwork sketch at the lower right
A small symmetrical scroll ornament is drawn at the lower right of the sheet. Short untranscribed labels sit beside it, apart from the water studies.