Newton, Isaac, Philosophia naturalis principia mathematica, 1713

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              nia ex viribus quibuſdam pendere poſſe, quibus corporum particulæ
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              per cauſas nondum cognitas vel in ſe mutuo impelluntur & ſe­
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              cundum figuras regulares cohærent, vel ab invicem fugantur &
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              recedunt: quibus viribus ignotis, Philoſophi hactenus Naturam fru­
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              ſtra tentarunt. </s>
              <s>Spero autem quod vel huic Philoſophandi modo,
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              vel veriori alicui, Principia hic poſita lucem aliquam præbebunt.
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              </s>
            </p>
            <p type="main">
              <s>
                <emph type="italics"/>
              In his edendis, Vir acutiſſimus & in omni literarum genere
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              eruditiſſimus
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              Edmundus Halleius
                <emph type="italics"/>
              operam navavit, nec ſolum
                <lb/>
              Typothetarum Sphalmata correxit & Schemata incidi curavit, ſed
                <lb/>
              etiam Auctor fuit ut horum editionem aggrederer. </s>
              <s>Quippe cum
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              demonſtratam a me Figuram Orbium cæleſtium impetraverat, ro­
                <lb/>
              gare non deſtitit ut eandem cum
                <emph.end type="italics"/>
              Societate Regali
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              communicarem,
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              Quæ deinde hortatibus & benignis ſuis auſpiciis effecit ut de ea­
                <lb/>
              dem in lucem emittenda cogitare inciperem. </s>
              <s>At poſtquam Mo­
                <lb/>
              tuum Lunarium inæqualitates aggreſſus eſſem, deinde etiam ælia
                <lb/>
              tentare cæpiſſem quæ ad leges & menſuras Gravitatis & aliarum
                <lb/>
              virium, & Figuras a corporibus ſecundum datas quaſcunque leges
                <lb/>
              attractis deſcribendas, ad motus corporum plurium inter ſe, ad
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              motus corporum in Mediis reſiſtentibus, ad vires, denſitates &
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              motus Mediorum, ad Orbes Cometarum & ſimilia ſpectant, edi­
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              tionem in aliud tempus differendam eſſe putavi, ut cætera rima­
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              rer & una in publicum darem. </s>
              <s>Quæ ad motus Lunares ſpectant,
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              (imperfecta cum ſint,) in Corollariis Propoſitionis
                <emph.end type="italics"/>
              LXVI.
                <emph type="italics"/>
              ſimul
                <lb/>
              complexus ſum, ne ſingula methodo prolixiore quam pro rei digNI­
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              tate proponere, & ſigillatim demonſtrare tenerer, & ſeriem reli­
                <lb/>
              quarum Propoſitionum interrumpere. </s>
              <s>Nonnulla ſero inventa lo­
                <lb/>
              cis minus idoneis inſerere malui, quam numerum Propoſitionum
                <lb/>
              & citationes mutare. </s>
              <s>Ut omnia candide legantur, & defectus,
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              in materia tam difficili non tam reprehendantur, quam novis Le­
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              ctorum conatibus inveſtigentur, & benigne ſuppleantur, enixe rogo.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>Dabam
                <emph type="italics"/>
              Cantabrigiæ,
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              e Collegio
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                <emph type="italics"/>
              S. Trinitatis,
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              Maii 8. 1686. </s>
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            <p type="main">
              <s>
                <emph type="italics"/>
              IS. NEWTON.
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              </s>
            </p>
          </chap>
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