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

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            <s xml:id="echoid-s315" xml:space="preserve">
              <pb file="0022" n="22" rhead="PRÆFATIO."/>
            illa, qua corpora gravia ſunt, in variis regionibus non
              <lb/>
            differunt.</s>
            <s xml:id="echoid-s316" xml:space="preserve"/>
          </p>
          <p style="it">
            <s xml:id="echoid-s317" xml:space="preserve">Tali cibo per tot annos uſus ſum, & </s>
            <s xml:id="echoid-s318" xml:space="preserve">hodie eo ſine timore
              <lb/>
            veſcar.</s>
            <s xml:id="echoid-s319" xml:space="preserve"/>
          </p>
          <p style="it">
            <s xml:id="echoid-s320" xml:space="preserve">Ubi cicutam video, venenum ibi dari concludo, licet de
              <lb/>
            hac ipſa quam video nullum experimentum ſumſero.</s>
            <s xml:id="echoid-s321" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s322" xml:space="preserve">Hæc omnia ratiocinia analogiam pro fundamento ha-
              <lb/>
            bent, & </s>
            <s xml:id="echoid-s323" xml:space="preserve">extra omne dubium eſt, nos a rerum Conditore
              <lb/>
            neceſſitate cogi per analogiam ratiocinari & </s>
            <s xml:id="echoid-s324" xml:space="preserve">hanc ideo ra-
              <lb/>
            tiociniorum legitimum eſſe fundamentum. </s>
            <s xml:id="echoid-s325" xml:space="preserve">Analogiæ au-
              <lb/>
            tem fundamentum eſt hoc; </s>
            <s xml:id="echoid-s326" xml:space="preserve">rerum univerſam congeriem
              <lb/>
            legibus immutatis regi.</s>
            <s xml:id="echoid-s327" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s328" xml:space="preserve">Quibus ſemel probatis, hac ratiocinandi methodo uti po-
              <lb/>
            terimus etiam in illis occaſionibus, in quibus non ſimilis
              <lb/>
            ratiocinandi neceſſitas datur. </s>
            <s xml:id="echoid-s329" xml:space="preserve">Argumento, quod in uno
              <lb/>
            caſu procedit, in alio aſſenſum negare non debemus. </s>
            <s xml:id="echoid-s330" xml:space="preserve">Quis
              <lb/>
            enim concipiet, quæ eodem modo probantur non æque
              <lb/>
            certa eſſe? </s>
            <s xml:id="echoid-s331" xml:space="preserve">Adde ex neceſſitate quidem generaliter deduci,
              <lb/>
            ratiocinandi methodum eſſe legitimam, ratiocinia vero pe-
              <lb/>
            culiaria ab hac neceſſitate non pendere. </s>
            <s xml:id="echoid-s332" xml:space="preserve">Ex analogia
              <lb/>
            concludo, cibum non eſſe veneſicum; </s>
            <s xml:id="echoid-s333" xml:space="preserve">an argumentum
              <lb/>
            non procedit niſi cum eſurio? </s>
            <s xml:id="echoid-s334" xml:space="preserve">Ex neceſſitate ratiocinandi
              <lb/>
            per analogiam, Mundum fixis legibus a rerum conditore
              <lb/>
            regi, probamus; </s>
            <s xml:id="echoid-s335" xml:space="preserve">unde deducimus, & </s>
            <s xml:id="echoid-s336" xml:space="preserve">ſublatâ neceſſitate,
              <lb/>
            ratiocinia hæc extra dubium eſſe poſita.</s>
            <s xml:id="echoid-s337" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s338" xml:space="preserve">In Phyſicis ergo per Phænomena Naturæ Leges ſunt
              <lb/>
            detegendæ; </s>
            <s xml:id="echoid-s339" xml:space="preserve">per inductionem pro generalibus habendæ;
              <lb/>
            </s>
            <s xml:id="echoid-s340" xml:space="preserve">de cetero Mathematice ratiocinandum. </s>
            <s xml:id="echoid-s341" xml:space="preserve">Qui, quo hæc </s>
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