Quotation from: The Notebooks of Leonardo Da Vinci

Written by: Leonardo da Vinci


No canal which is fed by a river can be permanent if the river
whence it originates is not wholly closed up, like the canal of
Martesana which is fed by the Ticino.


1012.


>From the beginning of the canal to the mill.


>From the beginning of the canal of Brivio to the mill of Travaglia
is 2794 trabochi, that is 11176 braccia, which is more than 3 miles
and two thirds; and here the canal is 57 braccia higher than the
surface of the water of the Adda, giving a fall of two inches in
every hundred trabochi; and at that spot we propose to take the
opening of our canal.

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