Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670

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              altitudinis alterius tunc velocitas, qua aqua defluit
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              ab orificio longioris non eſt quadrupla, ſed duplą
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              tantummodò eius velocitatis, qua aqua egreditur ex
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              infimo breuioris fiſtulæ orificio. </s>
              <s id="s.002384">Hinc deducitur
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              quod prædicta fluida in fiſtulis erectis inæqualium̨
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              longitudinum,
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              prorsùs naturam habent,
                <expan abbr="quã">quam</expan>
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              fune
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              , quorum proprietates alibi expoſuimus. </s>
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              Cap. 11. gra­
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              uia in fluido
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              velocitati­
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              bus inæqua­
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              libus ferri
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              debere.</s>
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              PROP. CCXV.
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              Fluxus æquæ intra fistulam velocior eſt circa axim, quam
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              propè internam cauam ſuperficiem eius.
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              <s id="s.002388">SEd antequam vlteriùs procedamus, animaduer­
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              tendum eſt, quod aqua velociùs fluit deorsùm̨
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              in medio cauitatis fiſtulæ, ſeù circa eius axim, quàm
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              versùs ſuperficiem eius cauam; propterea quod, vt
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              ſupra dictum eſt, gluten ipſius aquæ, quæ ſuperficiei
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              aſperæ internæ fiſtulæ adhæret magis retardat de­
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              fcenſum, & fluxum aquæ, quàm in intermedia parte
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              cauitatis fiſtulæ, vbi inſenſibili tenacitate aquæ par­
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              ticulæ viciſſim impediuntur, & hoc euincitur duplici
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              experimento; primò quia in ſupremo ſtrictæ fiſtulæ
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              orificio excauatur eius ſuperficies ad modum ſcutel­
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              læ, è contra in egreſſu fluidi ſuperficies aquæ ad mo­
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              dum conoidis, ſeu monticuli turgidi deorsùm ex­
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              porrigitur, quod minimè fieri poſſet, niſi partes a­
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              quæ intermediæ faciliùs fluerent, quàm partes col­
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              laterales internæ ſuperficiei fiſtulæ proximę, & adhę­
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              rentes, quæ vt diximus, à ſtabilibus aſperitatibus fi-</s>
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