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

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            <s xml:id="echoid-s1678" xml:space="preserve">
              <pb o="62" file="0076" n="76" rhead="HYDRODYNAMICÆ."/>
            ra tubi minorem continue habuerit effectum: </s>
            <s xml:id="echoid-s1679" xml:space="preserve">fecerunt autem iſtæ impedimen-
              <lb/>
            torum diminutiones, ut aquæ majori velocitate in loco, quo vena maxime
              <lb/>
            erat contracta, fluerent, & </s>
            <s xml:id="echoid-s1680" xml:space="preserve">nihilominus parcius erogarentur: </s>
            <s xml:id="echoid-s1681" xml:space="preserve">verum id eſſe
              <lb/>
            colligitur ex obſervatis effluxus temporibus & </s>
            <s xml:id="echoid-s1682" xml:space="preserve">venarum, ubi maxime contra-
              <lb/>
            huntur, amplitudinibus. </s>
            <s xml:id="echoid-s1683" xml:space="preserve">Igitur cum in hiſce venæ mutationibus cardo reiver-
              <lb/>
            tatur, è re erit phænomena uberius examinare & </s>
            <s xml:id="echoid-s1684" xml:space="preserve">explicare.</s>
            <s xml:id="echoid-s1685" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1686" xml:space="preserve">§. </s>
            <s xml:id="echoid-s1687" xml:space="preserve">2. </s>
            <s xml:id="echoid-s1688" xml:space="preserve">Aſſumamus v. </s>
            <s xml:id="echoid-s1689" xml:space="preserve">gr. </s>
            <s xml:id="echoid-s1690" xml:space="preserve">cylindrum verticalem, qui in medio fundi
              <lb/>
            horizontaliter poſiti, habeat foramen, aqua autem interna diviſa concipiatur
              <lb/>
            in ſtrata horizontalia: </s>
            <s xml:id="echoid-s1691" xml:space="preserve">His ita poſitis, cenſuimus motum cujusvis ſtrati eun-
              <lb/>
            dem eſſe & </s>
            <s xml:id="echoid-s1692" xml:space="preserve">talem quidem, ut ſitus horizontalis in illis conſervetur, ubi tamen
              <lb/>
            monui, non poſſe hanc hypotheſin extendi ad ſtrata foramini proxima, quo-
              <lb/>
            niam vero inde nullus error ſenſibilis oriri poſſit ratione velocitatis aquarum
              <lb/>
            effluentium, operæ pretium non eſſe, ut ejus rei ratio habeatur. </s>
            <s xml:id="echoid-s1693" xml:space="preserve">Nunc vero,
              <lb/>
            quando alia phænomena à motu aquæ internæ obliquo, qualis præſertim in
              <lb/>
            prædictis ſtratis foramini proximis eſt, pendent, hunc paucis luſtrabimus.</s>
            <s xml:id="echoid-s1694" xml:space="preserve"/>
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            <s xml:id="echoid-s1695" xml:space="preserve">§ 3. </s>
            <s xml:id="echoid-s1696" xml:space="preserve">Mihi autem videtur motum@ aquæ internæ talem eſſe conci-
              <lb/>
            piendum, qualis foret ſi aqua ferretur per tubulos infinitos juxta ſe poſitos,
              <lb/>
            quorum intermedii proxime rectà à ſuperficie verſus foramen deſcendunt, re-
              <lb/>
            liquis ſenſim ſe incurvantibus prope foramen, uti Fig. </s>
            <s xml:id="echoid-s1697" xml:space="preserve">28. </s>
            <s xml:id="echoid-s1698" xml:space="preserve">a oſtendit, ex quâ
              <lb/>
              <note position="left" xlink:label="note-0076-01" xlink:href="note-0076-01a" xml:space="preserve">Fig. 28. a.</note>
            apparet, ſingulas particulas hoc modo deſcendere motu tantum non verticali,
              <lb/>
            donec fundum prope attingant, eaſque tunc curſum ſuum ſenſim verſus fo-
              <lb/>
            ramen inflectere, ita ut particulæ fundo proximæ motu fere horizontali, alte-
              <lb/>
            ræ magis verticaliter ad foramen effluant. </s>
            <s xml:id="echoid-s1699" xml:space="preserve">Hujuſmodi motus ſæpe oculis ob-
              <lb/>
            ſervare potui, cum particulæ ceræ, quam vocant Hiſpanicæ, innatabant aquæ.
              <lb/>
            </s>
            <s xml:id="echoid-s1700" xml:space="preserve">Exinde autem intelligitur non poſſe ſingulas particulas foramini adſtantes dire-
              <lb/>
            ctionem ſuam integram ſervare, neque tamen ita eam inflectere, ut motum axi
              <lb/>
            plane parallelum aſſumant, ſed fore potius, ut vena aquæ effluentis contra-
              <lb/>
            hatur uſque in d e, ubi ſic notabiliter gracilior erit, quam in ortu circa fora-
              <lb/>
            men a c. </s>
            <s xml:id="echoid-s1701" xml:space="preserve">Hæc autem contractio venæ verticaliter fluentis non confundenda eſt
              <lb/>
            cum alia contractione, quæ fit ab acceleratione aquæ. </s>
            <s xml:id="echoid-s1702" xml:space="preserve">Dein patet quoque,
              <lb/>
            quod cum ſingularum particularum foramini adſtantium diverſa ſit directio,
              <lb/>
            neceſſario ab impetu, quem in ſe mutuo faciunt e
              <unsure/>
            ædem particulæ, vena </s>
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