Newton, Isaac, Philosophia naturalis principia mathematica, 1713

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        <body>
          <chap>
            <pb xlink:href="039/01/007.jpg"/>
            <p type="main">
              <s>
                <emph type="center"/>
              AUCTORIS
                <lb/>
              PRÆFATIO
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              AD
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              LECTOREM.
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              </s>
            </p>
            <p type="main">
              <s>
                <emph type="italics"/>
              CUM Veteres
                <emph.end type="italics"/>
              Mechanicam (
                <emph type="italics"/>
              uti Auctor eſt
                <emph.end type="italics"/>
              Pappus)
                <emph type="italics"/>
              in rerum
                <lb/>
              Naturalium inveſtigatione maximi fecerint; & Recentiores,
                <lb/>
              miſſis formis ſubſtantialibus & qualitatibus occultis, Phænomena
                <lb/>
              Naturæ ad leges Mathematicas revocare aggreſſi fint: Viſum eſt
                <lb/>
              in hoc Tractatu
                <emph.end type="italics"/>
              Matheſin
                <emph type="italics"/>
              excolere, quatenus ea ad
                <emph.end type="italics"/>
              Philoſophiam
                <lb/>
                <emph type="italics"/>
              ſpectat.
                <emph.end type="italics"/>
              Mechanicam
                <emph type="italics"/>
              vero duplicem Veteres conſtituerunt
                <emph.end type="italics"/>
              : Ra­
                <lb/>
              tionalem
                <emph type="italics"/>
              quæ per Demonſtrationes accurate procedit, &
                <emph.end type="italics"/>
              Practi­
                <lb/>
              cam.
                <emph type="italics"/>
              Ad Practicam ſpectant Artes omnes Manuales, a quibus
                <lb/>
              utique
                <emph.end type="italics"/>
              Mechanica
                <emph type="italics"/>
              nomen mutuata eſt. </s>
              <s>Cum autem Artifices pa­
                <lb/>
              rum accurate operari ſoleant, fit ut
                <emph.end type="italics"/>
              Mechanica
                <emph type="italics"/>
              omnis a
                <emph.end type="italics"/>
              Geome­
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              tria
                <emph type="italics"/>
              ita diſtinguatur, ut quicquid accuratum ſit ad
                <emph.end type="italics"/>
              Geometriam
                <lb/>
                <emph type="italics"/>
              referatur, quicquid minus accuratum ad
                <emph.end type="italics"/>
              Mechanicam.
                <emph type="italics"/>
              Attamen
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              errores non ſunt Artis ſed Artificum. </s>
              <s>Qui minus accurate ope­
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              ratur, imperfectior eſt Mechanicus, & ſi quis accuratiſſime ope­
                <lb/>
              rari poſſet, hic foret Mechanicus omnium perfectiſſimus. </s>
              <s>Nam &
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              Linearum rectarum & Circulorum deſcriptiones in quibus
                <emph.end type="italics"/>
              Geo­
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              metria
                <emph type="italics"/>
              fundatur, ad
                <emph.end type="italics"/>
              Mechanicam
                <emph type="italics"/>
              pertinent. </s>
              <s>Has lineas deſcri­
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              bere
                <emph.end type="italics"/>
              Geometria
                <emph type="italics"/>
              non docet ſed poſtulat. </s>
              <s>Poſtulat enim ut Tyro
                <lb/>
              eaſdem accurate deſcribere prius didicerit quam linen attingat
                <emph.end type="italics"/>
                <lb/>
              Geometriæ;
                <emph type="italics"/>
              dein, quomodo per has operationes Problemata ſol­
                <lb/>
              uantur, docet. </s>
              <s>Rectas & Circulos deſcribere Problemata ſunt,
                <emph.end type="italics"/>
              </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>