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XVI.} VASARI asserts: (Leonardo) fu il primo ancora, che
giovanetto discorresse sopra il fiume d'Arno per metterlo in canale
da Pisa a Fiorenza (ed. SANSONI, IV, 20).
The passage above is in some degree illustrated by the map on Pl.
CXII, where the course of the Arno westward from Empoli is shown.]
1
007.
The eddy made by the Mensola, when the Arno is low and the Mensola
full.
[Footnote: Mensola is a mountain stream which falls into the Arno
about a mile and a half above Florence.
A=Arno, I=Isola, M=Mvgone, P=Pesa, N=Mesola.]
1
008.
That the river which is to be turned from one place to another must
be coaxed and not treated roughly or with violence; and to do this a
sort of floodgate should be made in the river, and then lower down
one in front of it and in like manner a third, fourth and fifth, so
that the river may discharge itself into the channel given to it, or
that by this means it may be diverted from the place it has damaged,
as was done in Flanders--as I was told by Niccolo di Forsore.
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