Castelli, Benedetto, Of the mensuration of running waters, 1661
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              which by it ſelf is cauſed, there would alſo reſult the diminution
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              of that which is occaſioned by the other Brooks, to the right hand
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              of the
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              Po
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              of
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              Argenta
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              ; foraſmuch as the ſaid
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              Po
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              wanting all the
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              water of
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              Reno,
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              it would of neceſſity come to ebb in ſuch man­
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              ner, that the Valleys would have a greater Fall into the ſame,
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              and conſequently it would take in, and ſwallow greater abun­
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              dance of water; and by this means the Ditches and Draines
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              of the Up-Lands would likewiſe more eaſily Fall into them; eſ­
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              pecially if the ſcouring of
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              Zenzalino
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              were brought to perfection,
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              by which the waters of
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              Marrara
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              would fall into
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              Marmorta
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              : And
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              if alſo that of
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              Baſtia
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              were enlarged, and finiſhed, by which there
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              might enter as much water into the ſaid P
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              o
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              of
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              Argenta,
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              as is taken
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              from it by the removal of
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              Reno
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              ; although that by that meanes
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              the water of the Valleys would aſſwage double: Nor would the
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              people of
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              Argenta,
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              the Iſles of S.
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              Giorgio,
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              and
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              Comacchio
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              have any
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              cauſe to complain; for that there would not be given to them
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              more water than was taken away: Nay ſometimes whereas they
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              had Muddy waters, they would have clear; nor need they to fear
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              any riſing: And furthermore, by this means a very great quan­
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              tity of ground would be reſtored to culture; For the effecting of
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              all which, the ſumm of 50. thouſand Crowns would go very far,
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              and would ſerve the turn at preſent touching thoſe Brooks, car­
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              rying them a little farther in the mean time, to fill up the greater
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              cavities of the Valleys, that we might not enter upon a vaſter
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              and harder work, that would bring with it the difficulties of other
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              operations, and ſo would hinder the benefit which theſe people
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              expect from the paternal charity of His Holineſs.</s>
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