Bernoulli, Daniel, Hydrodynamica, sive De viribus et motibus fluidorum commentarii

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            <s xml:id="echoid-s7476" xml:space="preserve">
              <pb o="254" file="0268" n="268" rhead="HYDRODYNAMICÆ"/>
            get vas ſuâ velocitate moveri, ſuperficies autem aquæ declivitatem deponet,
              <lb/>
            rurſusque ad ſitum horizontalem componetur, veluti ſi quieſcat vas; </s>
            <s xml:id="echoid-s7477" xml:space="preserve">in his
              <lb/>
            adeoque caſibus non eſt vaſis motus, qui fluidorum ſtatum permutet, ſed
              <lb/>
            motus variatio.</s>
            <s xml:id="echoid-s7478" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s7479" xml:space="preserve">§. </s>
            <s xml:id="echoid-s7480" xml:space="preserve">21. </s>
            <s xml:id="echoid-s7481" xml:space="preserve">Quod in præcedente paragrapho monuimus de vaſe cylindrico
              <unsure/>
              <lb/>
            verticaliter poſito facile extenditur ad vas cujuscunque figuræ: </s>
            <s xml:id="echoid-s7482" xml:space="preserve">qualis enim
              <lb/>
            eſt inclinatio ſuperficiei aqueæ A B ad horizontem in vaſe cylindrivo, talis
              <lb/>
            erit in omnibus reliquis vaſis: </s>
            <s xml:id="echoid-s7483" xml:space="preserve">preſſio autem aquæ in latera vaſis ubique de-
              <lb/>
            finietur, ſi columna concipiatur verticalis ab eo puncto, pro quo preſſio
              <lb/>
            aquæ definienda eſt, usque ad ſuperficiem aquæ, quæ cogitatione producen-
              <lb/>
            da erit, ſi id opus fuerit. </s>
            <s xml:id="echoid-s7484" xml:space="preserve">Si loco vaſis ſumatur v. </s>
            <s xml:id="echoid-s7485" xml:space="preserve">gr. </s>
            <s xml:id="echoid-s7486" xml:space="preserve">tubus ab utraque par-
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            te inflexus, veluti A C D L (Fig. </s>
            <s xml:id="echoid-s7487" xml:space="preserve">69.) </s>
            <s xml:id="echoid-s7488" xml:space="preserve">isque moveatur in directione C D,
              <lb/>
              <note position="left" xlink:label="note-0268-01" xlink:href="note-0268-01a" xml:space="preserve">Fig. 69.</note>
            tum utraque ſuperficies M, N ſitum mutabit in A, B, donec recta A B debi-
              <lb/>
            tam obtineat inclinationem antea definitam; </s>
            <s xml:id="echoid-s7489" xml:space="preserve">fieri etiam poteſt ut pars aquæ
              <lb/>
            efflat per A, priusquam æquilibrium adſit: </s>
            <s xml:id="echoid-s7490" xml:space="preserve">ſi crus D L deorſum ſpectet,
              <lb/>
            ut in figura 70. </s>
            <s xml:id="echoid-s7491" xml:space="preserve">aqua manebit veluti ſuſpenſa: </s>
            <s xml:id="echoid-s7492" xml:space="preserve">in utroque enim caſu inclina-
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            tio lineæ A B cæteris paribus eadem erit.</s>
            <s xml:id="echoid-s7493" xml:space="preserve"/>
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          <p>
            <s xml:id="echoid-s7494" xml:space="preserve">In figura autem 69. </s>
            <s xml:id="echoid-s7495" xml:space="preserve">erit linea M A eo major, quo longius eſt crus ho-
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            rizontale C D: </s>
            <s xml:id="echoid-s7496" xml:space="preserve">ſic ut minimæ accelerationes aut etiam retardationes obſer-
              <lb/>
            vari poſſint, quod ſæpe aliis rebus inſervire poteſt, veluti dignoſcendis ac-
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            celerationibus navium, niſibusque quos exercent ſingulis remorum ſub-
              <lb/>
            merſionibus remiges; </s>
            <s xml:id="echoid-s7497" xml:space="preserve">in his tamen caſibus, quia non poteſt ſtatus ſuppo-
              <lb/>
            ni durationis ſeu permanentiæ, omnis fluidi motus, qui ſingulis vicibus re-
              <lb/>
            plicatur, eſſet inquirendus.</s>
            <s xml:id="echoid-s7498" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s7499" xml:space="preserve">Facit eadem hæc ratio, ut nondum liceat omnino ex præmiſſis deter-
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            minare, quid fieri debeat cum vaſa fluidum continentia percutiuntur.</s>
            <s xml:id="echoid-s7500" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s7501" xml:space="preserve">Poſſunt autem regulæ percuſſionum ex ordinariis legibus preſſionum de-
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            duci, quandoquidem percuſſio nihil aliud ſit, niſi ingens preſſio parum durans.</s>
            <s xml:id="echoid-s7502" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s7503" xml:space="preserve">§. </s>
            <s xml:id="echoid-s7504" xml:space="preserve">22. </s>
            <s xml:id="echoid-s7505" xml:space="preserve">Sit v. </s>
            <s xml:id="echoid-s7506" xml:space="preserve">gr. </s>
            <s xml:id="echoid-s7507" xml:space="preserve">tubus cylindricus horizontaliter ſitus A B C D (Fig. </s>
            <s xml:id="echoid-s7508" xml:space="preserve">71.)
              <lb/>
            </s>
            <s xml:id="echoid-s7509" xml:space="preserve">
              <note position="left" xlink:label="note-0268-02" xlink:href="note-0268-02a" xml:space="preserve">Fig. 71.</note>
            aqua plenus, impingatque globus P in tubi prominentiam A P: </s>
            <s xml:id="echoid-s7510" xml:space="preserve">tunc aqua
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            ſubito premet vehementer fundum B A verſus P: </s>
            <s xml:id="echoid-s7511" xml:space="preserve">ut hanc preſſionem </s>
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