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

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              <s>§.
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              In particular, the
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              SCIENCES MATHEMATI­
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              CAL
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              had then got that Fame and Eſteem in the Learned World,
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              that all men of Spirit or Quality became either Students in, or
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              Patrons of thoſe Sublime Knowledges. </s>
              <s>On this occaſion the Curi­
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              oſity of our
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              AUTHOUR
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              being awakened, his Active Wit
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              could not endure to be any longer confined to the Slaviſh Tuition
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              of Hermetical Pedagogues; but in concurrence with the Genius
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              of the Age, he alſo betook himſelf to thoſe moſt Generous and
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              Liberal Studies. </s>
              <s>His helps in this his deſign were ſo many, and
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              ſo extraordinary, that had his Inclination been weaker, or his
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              Apprehenſion leſſer, he could hardly have failed attaining more
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              than a Common Eminency in theſe Sciences. </s>
              <s>For beſides the De­
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              luge of Learned and Vſeful Books, which the Preſſe at that
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              time ſent forth from all parts of
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              EUROPE,
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              he had the good
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              Fortune to fall into the Acquaintance, and under the Inſtruction
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              of the moſt Demonſtrative and moſt Familiar Man in the World,
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              the Famous
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              GALILEO
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              : whoſe ſucceſſe being no leſſe upon
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              this his
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              Pupil
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              than upon the reſt of thoſe Illuſtrious and Ingeni­
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              ous Perſons that reſorted from all parts to ſit under his Admi­
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              rable Lectures, he in a ſhort time attained to that Name in the
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              Mathematicks, that he was invited to
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              ROME,
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              Complemen­
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              ted, and Preferred by his then Holineſſe the Eighth
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              URBAN,
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              upon his very firſt Acceſſion to the
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              Papacy,
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              which was in the
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              Year
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              1623.</s>
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              <s>§.
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              This Pope being moved with a Paternal Providence for the
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              Concerns of his Subjects in that part of
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              ITALY
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              about
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              BO­
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              LOGNA, FERRARA,
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              and
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              COMMACHIO,
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              ly­
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              ing between the Rivers of
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              PO
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              and
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              RENO,
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              which is part of
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              Lo Stato della Chieſa,
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              or the Church Patrimony, appoints this
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              our
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              CASTELLI
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              in the Year 1625, to accompany the Right
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              Honourable
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              Monſignore GORSINI
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              (a moſt obſervant and
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              intelligent perſon in theſe affaires, and at that time Superinten­
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              dent of the General Draines, and Preſident of
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              ROMAGNA)
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              in the Grand Viſitation which he was then ordered to make con­
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              cerning the diſorders occaſioned by the Waters of thoſe parts.
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              </s>
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              <s>§. </s>
              <s>CASTELLI,
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              having now an Opportunity to employ,
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              yea more, to improve ſuch Notions as he had imbued from the
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              Lectures of his Excellent
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              MASTER,
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              falls to his work with
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              all induſtry: and in the time that his Occaſions detained him in
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              ROMAGNA
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              he perfected the Firſt Book of this his Diſ­
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              courſe concerning the
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              Menſuration of Running Waters.
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              He con­
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              feſſeth that he had ſome years before applyed himſelf to this part
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              of Practical Geometry, and from ſeveral Obſervations collected
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              part of that Doctrine which at this time he put into Method, and
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              which had procured him the Repute of ſo much Skill that he began
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              </s>
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