The Notebooks of Leonardo Da Vinci Complete


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place the animals all on one line, except those of the same sort and  
age; and not the old with the young, nor some with an operculum and  
others without their operculum, nor some broken and others whole,  
nor some filled with sea-sand and large and small fragments of other  
shells inside the whole shells which remained open; nor the claws of  
crabs without the rest of their bodies; nor the shells of other  
species stuck on to them like animals which have moved about on  
them; since the traces of their track still remain, on the outside,  
after the manner of worms in the wood which they ate into. Nor would  
there be found among them the bones and teeth of fish which some  
call arrows and others serpents' tongues, nor would so many  
[Footnote: I. Scilla argued against this hypothesis, which was still  
accepted in his days; see: La vana Speculazione, Napoli 1670.]  
portions of various animals be found all together if they had not  
been thrown on the sea shore. And the deluge cannot have carried  
them there, because things that are heavier than water do not float  
on the water. But these things could not be at so great a height if  
they had not been carried there by the water, such a thing being  
impossible from their weight. In places where the valleys have not  
been filled with salt sea water shells are never to be seen; as is  
plainly visible in the great valley of the Arno above Gonfolina; a  
rock formerly united to Monte Albano, in the form of a very high  
bank which kept the river pent up, in such a way that before it  
could flow into the sea, which was afterwards at its foot, it formed  
two great lakes; of which the first was where we now see the city of  
Florence together with Prato and Pistoia, and Monte Albano. It  
808  


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