This will have before it the treatise on light and shade.
The edges in the moon will be most strongly lighted and reflect most light, because, there, nothing will be visible but the tops of the waves of the water [Footnote 5: I have thought it unnecessary to reproduce the detailed explanation of the theory of reflection on waves contained in the passage which follows this.].
Taken from The Notebooks of Leonardo da Vinci edited by Jean Paul Richter, 1880.