Newton, Isaac, Philosophia naturalis principia mathematica, 1713

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              <s>
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              ſed non Geometrica. </s>
              <s>Ex
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              Mechanica
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              poſtulatur horum ſolutio, in
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                <lb/>
              Geometria
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              docetur ſolutorum uſus. </s>
              <s>Ac gloriatur
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              Geometria
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                <emph type="italics"/>
              quod tam paucis principiis aliunde petitis tam multa præſtet. </s>
              <s>Fun­
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              datur igitur
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              Geometria
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              in praxi Mechanica, & nihil aliud eſt
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              quam
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              Mechanicæ univerſalis
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              pars illa quæ artem menſurandi ac­
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              curate proponit ac demonſtrat. </s>
              <s>Cum autem artes Manuales in
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              corporibus movendis præcipue verſentur, fit ut
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              Geometria
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              ad mag­
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              nitudinem,
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              Mechanica
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              ad motum vulgo referatur. </s>
              <s>Quo ſenſu
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              Me­
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              chanica rationalis
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              erit Scientia Motuum qui ex viribus quibuſ­
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              cunque reſultant, & Virium quæ ad motus quoſcunque requirun­
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              tur, accurate propoſita ac demonſtrata. </s>
              <s>Pars hæc
                <emph.end type="italics"/>
              Mechanicæ
                <emph type="italics"/>
              a
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              Veteribus in
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              Potentiis quinque
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              ad artes manuales ſpectantibus
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              exculta fuit, qui Gravitatem (cum potentia manualis non ſit) vix
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              aliter quam in ponderibus per potentias illas movendis conſiderarunt. </s>
              <s>
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              Nos autem non Artibus ſed Philoſophiæ conſulentes, deque poten­
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              tiis non manualibus ſed naturalibus ſcribentes, ea maxime tracta­
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              mus quæ ad Gravitatem, Levitatem, vim Elaſticam, reſiſtentiam
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              Fluidorum & ejuſmodi vires ſeu attractivas ſeu impulſivas ſpe­
                <lb/>
              ctant: Et ea propter, hæc noſtra tanquam Philoſophiæ principia
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              Mathematica proponimus. </s>
              <s>Omnis enim Philoſophiæ difficultas in
                <lb/>
              eo verſari videtur, ut a Phænomenis motuum inveſtigemus vires
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              Naturæ, deinde ab his viribus demonſtremus phænomena reliqua. </s>
              <s>
                <lb/>
              Et huc ſpectant Propoſitiones generales quas Libro primo & ſecundo
                <lb/>
              pertractavimus. </s>
              <s>In Libro autem tertio Exemplum hujus rei propo­
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              ſuimus per explicationem Syſtematis mundani. </s>
              <s>Ibi enim, ex phæ­
                <lb/>
              nomenis cæleſtibus, per Propoſitiones in Libris prioribus Mathe­
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              matice demonſtratas, derivantur vires Gravitatis quibus corpora
                <lb/>
              ad Solem & Planetas ſingulos tendunt. </s>
              <s>Deinde ex his viribus
                <lb/>
              per Propoſitiones etiam Mathematicas, deducuntur motus Planeta­
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              rum, Cometarum, Lunæ & Maris. </s>
              <s>Utinam cætera Naturæ phæ­
                <lb/>
              nomena ex principiis Mechanicis eodem argumentandi genere deri­
                <lb/>
              vare liceret. </s>
              <s>Nam multa me movent ut nonnihil ſuſpicer ea om­
                <emph.end type="italics"/>
              </s>
            </p>
          </chap>
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