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

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          <p>
            <s xml:id="echoid-s341" xml:space="preserve">
              <pb file="0023" n="23" rhead="PRÆFATIO."/>
            ctandæ Phyſices methodus fundamento nitatur, ſerio exa-
              <lb/>
            minaverit, ſolam hanc eſſe legitimam, hypotheſeſque
              <lb/>
            omnes eſſe rejiciendas, facillime percipiet.</s>
            <s xml:id="echoid-s342" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s343" xml:space="preserve">Hæc de philoſophandi Methodo; </s>
            <s xml:id="echoid-s344" xml:space="preserve">reſtat ut deipſo Opere
              <lb/>
            quid dicatur.</s>
            <s xml:id="echoid-s345" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s346" xml:space="preserve">Dividitur totum Opus in quatuor libros. </s>
            <s xml:id="echoid-s347" xml:space="preserve">Primus agit de
              <lb/>
            corpore in genere, & </s>
            <s xml:id="echoid-s348" xml:space="preserve">corporum ſolidorum motu. </s>
            <s xml:id="echoid-s349" xml:space="preserve">Secun-
              <lb/>
            dus fluida ſpectat. </s>
            <s xml:id="echoid-s350" xml:space="preserve">Quæ ad lucem pertinent, in tertio tra-
              <lb/>
            ctantur. </s>
            <s xml:id="echoid-s351" xml:space="preserve">In quarto tandem motus corporum cœleſtium,
              <lb/>
            & </s>
            <s xml:id="echoid-s352" xml:space="preserve">quæ in terris ad hos relationem habent, explicantur.
              <lb/>
            </s>
            <s xml:id="echoid-s353" xml:space="preserve">Primi duo libri hoc Tomo continentur.</s>
            <s xml:id="echoid-s354" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s355" xml:space="preserve">Ut Phyſices ſtudium quantum fieri poteſt amœnum & </s>
            <s xml:id="echoid-s356" xml:space="preserve">
              <lb/>
            facile reddatur, omnia Experimentis eſſe elucidanda, i-
              <lb/>
            pſaſque concluſiones Mathematicas, hac Methodo ſub o-
              <lb/>
            culos eſſe ponendas, neceſſarium duxi.</s>
            <s xml:id="echoid-s357" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s358" xml:space="preserve">Qui ſcientiæ elementa conſcribit, non quid novi, quan-
              <lb/>
            tum ad materiam, Orbi Litterato pollicetur; </s>
            <s xml:id="echoid-s359" xml:space="preserve">ideoque
              <lb/>
            inutile duxi monere ubi reperiantur quæ hîc traduntur.
              <lb/>
            </s>
            <s xml:id="echoid-s360" xml:space="preserve">Pro meo ſumſi quodcunque propoſito meo utile mihi vi-
              <lb/>
            ſum eſt, credidique ſatis eſſe de hoc monere ad omnem
              <lb/>
            furti ſuſpicionem vitandam. </s>
            <s xml:id="echoid-s361" xml:space="preserve">Malo gloriam, ſi quam ex
              <lb/>
            paucis novis, quæ ſparſim in hoc Tractatu dantur, ſpe-
              <lb/>
            rare poſſum amittere, quam alii ſuam detrahere; </s>
            <s xml:id="echoid-s362" xml:space="preserve">ſumat
              <lb/>
            ergo quiſque quod ſuum credit, nihil mihi vindico.</s>
            <s xml:id="echoid-s363" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s364" xml:space="preserve">Quod Machinas attinet, quibus Experimenta inſtituen-
              <lb/>
            da ſunt, varias aliorum Auctorum imitari curavi, multas
              <lb/>
            inter has mutavi perfectioreſque reddidi, plures novas ad-
              <lb/>
            didi. </s>
            <s xml:id="echoid-s365" xml:space="preserve">Neque mirum in hanc neceſſitatem illum </s>
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