Both the cloud and the tree display no roundness at all on their shaded side.
On images reflected in water.
478.
Painters often deceive themselves, by representing water in which they make the water reflect the objects seen by the man. But the water reflects the object from one side and the man sees it from the other; and it often happens that the painter sees an object from below, and thus one and the same object is seen from hind part before and upside down, because the water shows the image of the object in one way, and the eye sees it in another.
Of rainbows and rain (479. 480).
479.
The colours in the middle of the rainbow mingle together.
The bow in itself is not in the rain nor in the eye that sees it; though it is generated by the