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

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          <pb file="0016" n="16" rhead="PRÆFATIO."/>
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            <s xml:id="echoid-s181" xml:space="preserve">quantis refluum vaga Cynthia Pontum
              <lb/>
            Viribus impellit; </s>
            <s xml:id="echoid-s182" xml:space="preserve">dum fractis fluctibus ulvam
              <lb/>
            Deſerit, ac nautis ſuſpectas nudat arenas;
              <lb/>
            </s>
            <s xml:id="echoid-s183" xml:space="preserve">Alternisvicibus ſuprema ad littora pulſans.</s>
            <s xml:id="echoid-s184" xml:space="preserve">De inveſtigiatione autem Naturæ Legum ut dicam, res
              <lb/>
            altius petenda eſt.</s>
            <s xml:id="echoid-s185" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s186" xml:space="preserve">Subſtantiæ quid ſint inter nobis ignota referendum eſt.
              <lb/>
            </s>
            <s xml:id="echoid-s187" xml:space="preserve">Quaſdam ex. </s>
            <s xml:id="echoid-s188" xml:space="preserve">gr. </s>
            <s xml:id="echoid-s189" xml:space="preserve">materiæ proprietates novimus, ſed in
              <lb/>
            quo ſubjecto hæreant hæ nos omnino latet. </s>
            <s xml:id="echoid-s190" xml:space="preserve">An Corpori
              <lb/>
            non multæ aliæ tribuendæ ſint proprietates, de quibus
              <lb/>
            nullam habemus ideam, quis aſſerere poteſt? </s>
            <s xml:id="echoid-s191" xml:space="preserve">Cui etiam
              <lb/>
            enotuit an, præter Corporis proprietates quæ a materiæ
              <lb/>
            eſſentia pofluunt, non dentur aliæ a DEI libera poteſtate
              <lb/>
            pendentes, ſubſtantiamque extenſam & </s>
            <s xml:id="echoid-s192" xml:space="preserve">ſolidam (hæc e-
              <lb/>
            nim a nobis Corpus vocatur) quibuſdam, ſine quibus exi-
              <lb/>
            ſtere poſſet, proprietatibus ornari. </s>
            <s xml:id="echoid-s193" xml:space="preserve">De ignotis nihil af-
              <lb/>
            firmandum aut negandum eſt.</s>
            <s xml:id="echoid-s194" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s195" xml:space="preserve">Quantum ab hac regula aberrant illi, qui, quaſi o-
              <lb/>
            mnia quæ ad Corpus pertinent pleniſſime perſpecta habe-
              <lb/>
            rent, in Phyſicis ratiocinantur, paucaſque Corporis pro-
              <lb/>
            prietates notas ipſum Corpus conſtituere aſſerere non
              <lb/>
            dubitant.</s>
            <s xml:id="echoid-s196" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s197" xml:space="preserve">Quid obſecro ſibi vult proprietates ſubſtantiæ ipſam
              <lb/>
            conſtituere ſubſtantiam? </s>
            <s xml:id="echoid-s198" xml:space="preserve">An quæ ſeparatim ſubſiſtere non
              <lb/>
            poſſunt ſimul juncta ſubſiſtent? </s>
            <s xml:id="echoid-s199" xml:space="preserve">An extenſum, impenetra-
              <lb/>
            bile, mobile eſſe, & </s>
            <s xml:id="echoid-s200" xml:space="preserve">c. </s>
            <s xml:id="echoid-s201" xml:space="preserve">concipi poſſunt, ſine ſubjecto cui
              <lb/>
            hæ proprietates @mpetant? </s>
            <s xml:id="echoid-s202" xml:space="preserve">Et an hujus ſubjecti ullam ha-
              <lb/>
            bemus ideam?</s>
            <s xml:id="echoid-s203" xml:space="preserve"/>
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