Gravesande, Willem Jacob 's, Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1

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            <s xml:id="echoid-s9227" xml:space="preserve">
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            tem , altitudo aquæ, recedendo a Fluminis initio.</s>
            <s xml:id="echoid-s9228" xml:space="preserve">,
              <note symbol="*" position="left" xlink:label="note-0344-01" xlink:href="note-0344-01a" xml:space="preserve">858.</note>
            tinuo minuitur, & </s>
            <s xml:id="echoid-s9229" xml:space="preserve">aquæ ſuperſicies adipiſcitur figuram iqs.</s>
            <s xml:id="echoid-s9230" xml:space="preserve"/>
          </p>
          <note position="left" xml:space="preserve">860.</note>
          <p>
            <s xml:id="echoid-s9231" xml:space="preserve">Ad determinandam aquæ in variis locis velocitatem, con-
              <lb/>
              <note position="left" xlink:label="note-0344-03" xlink:href="note-0344-03a" xml:space="preserve">861.</note>
            cipiamus canalis aperturam ADCB plano claudi; </s>
            <s xml:id="echoid-s9232" xml:space="preserve">ſi perfo-
              <lb/>
            retur planum, eo celerius ex foramine proſiliet aqua, quo
              <lb/>
            magis hoc diſtabit a ſuperficie aquæ bi; </s>
            <s xml:id="echoid-s9233" xml:space="preserve">eandemque habe-
              <lb/>
            bit aqua celeritatem, quam corpus, cadendo a ſuperficie
              <lb/>
            aquæ ad profunditatem foraminis infra illam, acquirit ;</s>
            <s xml:id="echoid-s9234" xml:space="preserve">
              <note symbol="*" position="left" xlink:label="note-0344-04" xlink:href="note-0344-04a" xml:space="preserve">796.</note>
            quod ex preſſione aquæ ſuperincumbentis oritur. </s>
            <s xml:id="echoid-s9235" xml:space="preserve">Datur
              <lb/>
            eadem preſſio, id eſt, eadem vis motrix, quando impedi-
              <lb/>
            mentum in AC tollitur; </s>
            <s xml:id="echoid-s9236" xml:space="preserve">ponimus enim capax adeo rece-
              <lb/>
            ptaculum, ut & </s>
            <s xml:id="echoid-s9237" xml:space="preserve">in hoc caſu preſſio lateralis agat in aquam
              <lb/>
            quæ canalem intrat.</s>
            <s xml:id="echoid-s9238" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s9239" xml:space="preserve">Hunc nunc ingreditur unaquæque particula aquæ ea
              <lb/>
            celeritate, quam corpus acquirit, cadendo ab aquæ ſuperfi-
              <lb/>
            cie ad particulæ profunditatem. </s>
            <s xml:id="echoid-s9240" xml:space="preserve">Particula hæc, juxta pla-
              <lb/>
            num inclinatum, in canale movetur, & </s>
            <s xml:id="echoid-s9241" xml:space="preserve">hujus motus acce-
              <lb/>
            leratur; </s>
            <s xml:id="echoid-s9242" xml:space="preserve">& </s>
            <s xml:id="echoid-s9243" xml:space="preserve">quidem eodem modo ac ſi verticaliter cadendo
              <lb/>
            motum continuaſſet ad eandem profunditatem infra ſuper-
              <lb/>
            ficiem aquæ in origine Fluminis .</s>
            <s xml:id="echoid-s9244" xml:space="preserve"/>
          </p>
          <note symbol="*" position="left" xml:space="preserve">271.</note>
          <p>
            <s xml:id="echoid-s9245" xml:space="preserve">Si ducatur horizontalis linea it, particula in r habebit
              <lb/>
            celeritatem quam corpus cadendo per i C & </s>
            <s xml:id="echoid-s9246" xml:space="preserve">devolvendo
              <lb/>
            per Cr poteſt acquirere; </s>
            <s xml:id="echoid-s9247" xml:space="preserve">quæ eſt celeritas, caſu per tr, a
              <lb/>
            corpore acquiſita. </s>
            <s xml:id="echoid-s9248" xml:space="preserve">Vbique ergo menſuratur particulæ cele-
              <lb/>
              <note position="left" xlink:label="note-0344-06" xlink:href="note-0344-06a" xml:space="preserve">862.</note>
            ritas, ducendo ab hac perpendicularem ad planum horizon-
              <lb/>
            tale, quod per ſuperficiem aquæ in origine Fluminis concipi-
              <lb/>
            tur, & </s>
            <s xml:id="echoid-s9249" xml:space="preserve">velocitas, quam corpus per hanc perpendicularem ca-
              <lb/>
            dendo acquirit, erit particulæ celeritas, quæ major eſt pro
              <lb/>
            majori perpendicularis longitudine, & </s>
            <s xml:id="echoid-s9250" xml:space="preserve">non augetur preſſione
              <lb/>
              <note position="left" xlink:label="note-0344-07" xlink:href="note-0344-07a" xml:space="preserve">863.</note>
            aquæ ſuper incumbentis, quæ non poteſt augere celeritatem
              <lb/>
            aquæ, quæ aliunde majorem habet quam quæ ex hac preſ-
              <lb/>
            ſione oriri poteſt: </s>
            <s xml:id="echoid-s9251" xml:space="preserve">eodem modo ac corpus inſequens in an-
              <lb/>
            tecedens celerius motum agere non poteſt.</s>
            <s xml:id="echoid-s9252" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s9253" xml:space="preserve">In puncto quocunque r ad Fluminis fundum ducatur per-
              <lb/>
            pendicularis rs, Fluminis altitudinem menſurans; </s>
            <s xml:id="echoid-s9254" xml:space="preserve">cum non
              <lb/>
            horizontalis ſit rs, ſi a variis hujus lineæ punctis ad it </s>
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