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

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          <p>
            <s xml:id="echoid-s1573" xml:space="preserve">
              <pb o="58" file="0072" n="72" rhead="HYDRODYNAMICÆ."/>
            quantulum perforavi, haud procul à G, rurſusque obſervavi, paullo lentius
              <lb/>
            deſcendere ſuperficiem internam, cujus rei me certum fecit quod numera-
              <lb/>
            bam oſcillationes alicujus penduli, quibus ſuperficies per datum ſpatium
              <lb/>
            deſcendit: </s>
            <s xml:id="echoid-s1574" xml:space="preserve">ratione autem aquarum effluentium vidi aliquando aquas pleno
              <lb/>
            orificio effluere & </s>
            <s xml:id="echoid-s1575" xml:space="preserve">tunc aquas ſolito minus eſſe pellucidas, jactum autem or-
              <lb/>
            dinarium vel ordinario paullo majorem facere; </s>
            <s xml:id="echoid-s1576" xml:space="preserve">ſæpiſſime autem aquam & </s>
            <s xml:id="echoid-s1577" xml:space="preserve">
              <lb/>
            aërem juxta ſe ferri, illam in parte tubi inferiore juxta latus F M, hunc in
              <lb/>
            ſuperiori juxta G N & </s>
            <s xml:id="echoid-s1578" xml:space="preserve">tunc aquas eſſe limpidas atque velocitate ejici ſolito
              <lb/>
            non ſolum haud minori, ſed & </s>
            <s xml:id="echoid-s1579" xml:space="preserve">multo majori, quod fieri poſſe haud obſcu-
              <lb/>
            re prævideram. </s>
            <s xml:id="echoid-s1580" xml:space="preserve">De hâc re in ſequenti Sectione aliud experimentum majori
              <lb/>
            præciſione inſtitutum apponam.</s>
            <s xml:id="echoid-s1581" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1582" xml:space="preserve">Dabitur autem fortaſſe alibi locus demonſtrandi aquas ſufficienti aëris
              <lb/>
            quantitate permiſtas, ea proxime effluere copia, qua effluerent reſciſſo tu-
              <lb/>
            bo eo in loco ubi eſt perforatus, cui rei ipſam quoque experentiam reſpon-
              <lb/>
            dere animadverti.</s>
            <s xml:id="echoid-s1583" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div75" type="section" level="1" n="53">
          <head xml:id="echoid-head70" style="it" xml:space="preserve">De canalibus recurvis.</head>
          <head xml:id="echoid-head71" xml:space="preserve">Ad §. 27.</head>
          <p>
            <s xml:id="echoid-s1584" xml:space="preserve">DUcta in pariete horizontali M N (Fig. </s>
            <s xml:id="echoid-s1585" xml:space="preserve">27.) </s>
            <s xml:id="echoid-s1586" xml:space="preserve">tubum cylindricum C D B
              <lb/>
              <note position="left" xlink:label="note-0072-01" xlink:href="note-0072-01a" xml:space="preserve">Fig. 27.</note>
            totum aquâ plenum, cruraque ambo inter ſe parallela habentem, ita
              <lb/>
            poſui, ut extremitas altera B horizontalem M N raderet, ſimulque
              <lb/>
            crura eſſent verticalia, dum interea orificium C digito obturabam aquæ ef-
              <lb/>
            fluxum ſic compeſcens.</s>
            <s xml:id="echoid-s1587" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1588" xml:space="preserve">Dein remoto digito obſervavi, altitudinem maximam B P, ad quam
              <lb/>
            aquæ effluentes aſcendebant, aliisque vicibus attendi ad locum E, ad quem
              <lb/>
            deſcendit aquæ ſuperficies; </s>
            <s xml:id="echoid-s1589" xml:space="preserve">feci autem fub duabus diverſis circumſtantiis ex-
              <lb/>
            perimentum; </s>
            <s xml:id="echoid-s1590" xml:space="preserve">primo enim loco nullum in B poſueram operculum; </s>
            <s xml:id="echoid-s1591" xml:space="preserve">dein-
              <lb/>
            de operculum adhibui tali lumine perforatum, quod amplitudinem haberet
              <lb/>
            ratione amplitudinis tubi ut 1. </s>
            <s xml:id="echoid-s1592" xml:space="preserve">ad √ 2. </s>
            <s xml:id="echoid-s1593" xml:space="preserve">Interim menſuræ tales fuere: </s>
            <s xml:id="echoid-s1594" xml:space="preserve">C A
              <lb/>
            = 345; </s>
            <s xml:id="echoid-s1595" xml:space="preserve">A D B = 530; </s>
            <s xml:id="echoid-s1596" xml:space="preserve">B P = 33; </s>
            <s xml:id="echoid-s1597" xml:space="preserve">& </s>
            <s xml:id="echoid-s1598" xml:space="preserve">A E = 88. </s>
            <s xml:id="echoid-s1599" xml:space="preserve">particulis, quarum 375
              <lb/>
            longitudinem Pedis Lond. </s>
            <s xml:id="echoid-s1600" xml:space="preserve">exæquabant. </s>
            <s xml:id="echoid-s1601" xml:space="preserve">Hæc ita fuere in caſu priori, in al-
              <lb/>
            tero autem manentibus reliquis vidi B P = 64 & </s>
            <s xml:id="echoid-s1602" xml:space="preserve">A E = 54. </s>
            <s xml:id="echoid-s1603" xml:space="preserve">Notabo hîcin tran-
              <lb/>
            ſitu, quod alio explorare cupiens modo maximum deſcenſum A E, poſt fini-
              <lb/>
            tum experimentum inclinaverim tubum, donec aqua jam jam effluxui per B </s>
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