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1
105.
Write to Bartolomeo the Turk as to the flow and ebb of the Black
sea, and whether he is aware if there be such a flow and ebb in the
Hyrcanean or Caspian sea. [Footnote: The handwriting of this note
points to a late date.]
1
106.
WHY WATER IS FOUND AT THE TOP OF MOUNTAINS.
>From the straits of Gibraltar to the Don is 3500 miles, that is one
mile and 1/6, giving a fall of one braccio in a mile to any water
that moves gently. The Caspian sea is a great deal higher; and none
of the mountains of Europe rise a mile above the surface of our
seas; therefore it might be said that the water which is on the
summits of our mountains might come from the height of those seas,
and of the rivers which flow into them, and which are still higher.
The sea of Azov.
1
107.
Hence it follows that the sea of Azov is the highest part of the
Mediterranean sea, being at a distance of 3500 miles from the
Straits of Gibraltar, as is shown by the map for navigation; and it
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