998

On the motion of air.

OF MOTION.

I ask whether the true motion of the clouds can be known by the motion of their shadows; and in like manner of the motion of the sun.

Taken from The Notebooks of Leonardo da Vinci edited by Jean Paul Richter, 1880.

. . .

The formation of mountains.

979,

980,

981,

982,

The authorities for the study of the structure of the earth.

984,

Doubts about the deluge.

That marine shells could not go up the mountains.

The marine shells were not produced away from the sea.

Further researches.

989,

990,