The Notebooks of Leonardo Da Vinci Complete


google search for The Notebooks of Leonardo Da Vinci Complete

Return to Master Book Index.

Page
812 813 814 815 816

Quick Jump
1 306 613 919 1225

not yet dry. And all marine clays still contain shells, and the  
shells are petrified together with the clay. From their firmness and  
unity some persons will have it that these animals were carried up  
to places remote from the sea by the deluge. Another sect of  
ignorant persons declare that Nature or Heaven created them in these  
places by celestial influences, as if in these places we did not  
also find the bones of fishes which have taken a long time to grow;  
and as if, we could not count, in the shells of cockles and snails,  
the years and months of their life, as we do in the horns of bulls  
and oxen, and in the branches of plants that have never been cut in  
any part. Besides, having proved by these signs the length of their  
lives, it is evident, and it must be admitted, that these animals  
could not live without moving to fetch their food; and we find in  
them no instrument for penetrating the earth or the rock where we  
find them enclosed. But how could we find in a large snail shell the  
fragments and portions of many other sorts of shells, of various  
sorts, if they had not been thrown there, when dead, by the waves of  
the sea like the other light objects which it throws on the earth?  
Why do we find so many fragments and whole shells between layer and  
layer of stone, if this had not formerly been covered on the shore  
by a layer of earth thrown up by the sea, and which was afterwards  
petrified? And if the deluge before mentioned had carried them to  
these parts of the sea, you might find these shells at the boundary  
of one drift but not at the boundary between many drifts. We must  
also account for the winters of the years during which the sea  
multiplied the drifts of sand and mud brought down by the  
814  


Page
812 813 814 815 816

Quick Jump
1 306 613 919 1225