become deeper, the more quickly are their sides worn away.
982.
In every concavity at the summit of the mountains we shall always find the divisions of the strata in the rocks.
983.
OF THE SEA WHICH ENCIRCLES THE EARTH.
I find that of old, the state of the earth was that its plains were all covered up and hidden by salt water. [Footnote: This passage has already been published by Dr. M. JORDAN: Das Malerbuch des L. da Vinci, Leipzig 1873, p. 86. However, his reading of the text differs from mine.]
The authorities for the study of the structure of the earth.
984.
Since things are much more ancient than letters, it is no marvel if, in our day, no records exist of these seas having covered so many countries; and if, moreover, some records had existed, war and conflagrations, the deluge of waters,