Castelli, Benedetto, Of the mensuration of running waters, 1661

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1
1. From which operation doth follow in the firſt place, that
the Lake being filled and increaſed by tbeſe Waters, ſhall be
more Navigable, and paſſible, than at preſent we ſee it to be.
2. By the current of theſe Waters, the Chanels will be ſcour­
ed, and will be kept clean from time to time.
3. There will not appear at the times of low-waters ſo many
Shelves, and ſuch heaps of Mud, as do now appear.
4. The Ayr will become more wholeſom, for that it ſhall not
be ſo infected by putrid vapours exhaled by the Sun, ſo long as
the Miery Ouze ſhall be covered by the Waters.
5. Laſtly, in the current of theſe advantagious Waters,, which
muſt iſſue out of the Lake into the Sea, beſides thoſe of the Tyde,
the Ports will be kept ſcoured, and clear: And this is as much as
I ſhall offer for the preſent, touching this weighty buiſineſs; al­
waies ſubmitting my ſelf to ſounder judgements.
Of the above-ſaid Writing I preſented a Copy at Venice, at a
full Colledge, in which I read it all, and it was hearkned to with
very great attention; and at laſt I preſented it to the Duke, and
left ſome Copies thereof with ſundry Senators, and went my way,
promiſing with all intenſeneſs to apply my pains with reiterated
ſtudies in the publick ſervice; and if any other things ſhould come
into my minde, I promiſed to declare them ſincerely, and ſo took
leave of His ſerenity, and that Noble Council. When I was
returned to Rome, this buſineſs night and day continually run­
ning in my mind, I hapned to think of another admirable and
moſt important conceit, which with effectual reaſons, confirmed
by exact operations, I with the Divine aſſiſtance, made clear and
manifeſt; and though the thing at firſt ſight ſeemed to me a moſt
extravagant Paradox, yet notwithſtanding, having ſatisfied my
ſelf of the whole buſineſs, I ſent it in writing to the moſt Illuſtri­
ous and moſt Noble Signore Gio. Baſadonna; who after he had
well conſidered my Paper, carried it to the Council; and after
that thoſe Lords had for many months maturely conſidered
thereon, they in the end reſolved to ſuſpend the execution of the
diverſion which they had before conſulted to make of the River
Sile, and of four other Rivers, which alſo fall into the Lake; a
thing by me blamed in this ſecond Paper, as moſt prejudicial,
and harmful.
The writing ſpake as followeth.

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