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Isola is written above d in the smaller island; a is written
on the margin on the bank of the river above 1. I; in the
reproduction it is not visible. As may be seen from the last
sentence, the observation was made after long study of the river's
course, when Leonardo had resided for some time at, or near,
Amboise.]
1
075.
The water may be dammed up above the level of Romorantin to such a
height, that in its fall it may be used for numerous mills.
1
075.
The river at Villefranche may be conducted to Romorantin which may
be done by the inhabitants; and the timber of which their houses are
built may be carried in boats to Romorantin [Footnote: Compare No.
7
44.]. The river may be dammed up at such a height that the waters
may be brought back to Romorantin with a convenient fall.
1
076.
As to whether it is better that the water should all be raised in a
single turn or in two?
The answer is that in one single turn the wheel could not support
867
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