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

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            <s xml:id="echoid-s3548" xml:space="preserve">
              <pb o="123" file="0137" n="137" rhead="SECTIO SEXTA."/>
            theoria in hâc ſectione indicat; </s>
            <s xml:id="echoid-s3549" xml:space="preserve">aliquando tamen longitudinem illam debitâ
              <lb/>
            paullo majorem inveni; </s>
            <s xml:id="echoid-s3550" xml:space="preserve">cujus rei rationem haud @ difficulter hanc eſſe vidi,
              <lb/>
            quod frictiones fluidi excurſiones non ſolum diminuant, ſed & </s>
            <s xml:id="echoid-s3551" xml:space="preserve">retardent@, ut
              <lb/>
            &</s>
            <s xml:id="echoid-s3552" xml:space="preserve">, quod tubi eo in loco, quo inflectuntur, ſtrictiores eſſe ſoleant: </s>
            <s xml:id="echoid-s3553" xml:space="preserve">Id poſte-
              <lb/>
            rius, ſi omni cura evitetur, ſique ipſæ @inflexiones non uno angulo ſed lente
              <lb/>
            fiant, & </s>
            <s xml:id="echoid-s3554" xml:space="preserve">ſi denique pro liquore oſcillante mercurius puriſſimus adhibeatur,
              <lb/>
            dubium mihi nullum ſupereſt, fore ut experimenta præmiſſam theoriam ad
              <lb/>
            amuſſim confirment, ita, ut operæ pretium non duxerim anxie de illis in-
              <lb/>
            quirere.</s>
            <s xml:id="echoid-s3555" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3556" xml:space="preserve">Id tamen ratione experimentorum à me inſtitutorum ſuperaddam,
              <lb/>
            quod amplitudines tuborum ante experimentum in diverſis eorum locis accu-
              <lb/>
            rate exploraverim ope columellæ mercurii, quæ dum gradatim totam longi-
              <lb/>
            tudinem tubi percurreret, longitudinibus ſuis diverſis, quarum menſuras aſ-
              <lb/>
            ſiduè accipiebam, amplitudinum variationes ubique manifeſtabat: </s>
            <s xml:id="echoid-s3557" xml:space="preserve">Et hæ
              <lb/>
            quidem amplitudines ita in tubo erunt explorandæ, poſtquam jam fuerit in-
              <lb/>
            curvatus, nam ab incurvatione amplitudines admodum decreſcunt. </s>
            <s xml:id="echoid-s3558" xml:space="preserve">Hæc
              <lb/>
            ratio fuit, quod in primo hanc in rem à me ſumto experimento, ſucceſſus
              <lb/>
            expectationem meam fefellerit: </s>
            <s xml:id="echoid-s3559" xml:space="preserve">Tubum nempe vitreum, cujusmodi pro
              <lb/>
            barometris conficiendis adhibere ſolent, ſatis amplum eundemque fere per-
              <lb/>
            fecte cylindricum, incurvare feci, ut oſtendit propemodum Figura vigeſi-
              <lb/>
            ma ſeptima, eoque deinde mercurio maximam partem repleto, oſcillatio-
              <lb/>
            nes ejus longe tardius fieri vidi, quam expectaveram, quia non attendi,
              <lb/>
            tubum ab incurvatione in D inſigniter fuiſſe conſtrictum, præſertim ubi an-
              <lb/>
            guli formantur. </s>
            <s xml:id="echoid-s3560" xml:space="preserve">Hujus igitur rei, ut rationem haberem, tubis deinceps
              <lb/>
            lente incurvatis uſus fui, quales oſtendit Fig. </s>
            <s xml:id="echoid-s3561" xml:space="preserve">35. </s>
            <s xml:id="echoid-s3562" xml:space="preserve">a. </s>
            <s xml:id="echoid-s3563" xml:space="preserve">in iisque amplitudines
              <lb/>
            poſt incurvationem diligenter exploravi.</s>
            <s xml:id="echoid-s3564" xml:space="preserve"/>
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