Quotation from: The Notebooks of Leonardo Da Vinci

Written by: Leonardo da Vinci


Some assert that it is true that the earth, which is not covered by
water is much less than that covered by water. But considering the
size of 7000 miles in diameter which is that of this earth, we may
conclude the water to be of small depth.


938.


OF THE EARTH.


The great elevations of the peaks of the mountains above the sphere
of the water may have resulted from this that: a very large portion
of the earth which was filled with water that is to say the vast
cavern inside the earth may have fallen in a vast part of its vault
towards the centre of the earth, being pierced by means of the
course of the springs which continually wear away the place where
they pass.

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