Newton, Isaac, Philosophia naturalis principia mathematica, 1713

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="039/01/035.jpg" pagenum="7"/>
              entem verſus cum velocitatis parte una: movebitur Nauta vere &
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              abſolute in ſpatio immoto cum velocitatis partibus 10001 in o­
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              rientem, & relative in terra occidentem verſus cum velocitatis
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              partibus novem. </s>
            </p>
            <p type="main">
              <s>Tempus Abſolutum a relativo diſtinguitur in Aſtronomia per Æ­
                <lb/>
              quationem temporis vulgi. </s>
              <s>Inæquales enim ſunt dies Naturales,
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              qui vulgo tanquam æquales promenſura temporis habentur. </s>
              <s>Hanc
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              inæqualitatem corrigunt Aſtronomi, ut ex veriore tempore </s>
              <s>
                <lb/>
              motus cæleſtes. </s>
              <s>Poſſibile eſt, ut nullus ſit motus æquabilis quo
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              Tempus accurate menſuretur. </s>
              <s>Accelerari & retardari poſſunt motus
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              omnes, ſed fluxus temporis Abſoluti mutari nequit. </s>
              <s>Eadem eſt du­
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              ratio ſeu perſeverantia exiſtentiæ rerum; ſive motus ſint celeres, ſive
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              tardi, ſive nulli: proinde hæc a menſuris ſuis ſenſibilibus merito
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              diſtinguitur, & ex iiſdem colligitur per Æquationem Aſtronomi­
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              cam. </s>
              <s>Hujus autem æquationis in determinandis Phænomenis ne­
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              ceſſitas, tum per experimentum Horologii Oſcillatorii, tum etiam
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              per eclipſes Satellitum Jovis evincitur. </s>
            </p>
            <p type="main">
              <s>Ut partium Temporis ordo eſt immutabilis, ſic etiam ordo par­
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              tium Spatii. </s>
              <s>Moveantur hæ de locis ſuis, & movebuntur (ut ita
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              dicam) de ſeipſis. </s>
              <s>Nam tempora & ſpatia ſunt ſui ipſorum &
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              rerum omnium quaſi Loca. </s>
              <s>In Tempore quoad ordinem ſucceſſi­
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              onis; in Spatio quoad ordinem ſitus locantur univerſa. </s>
              <s>De illo­
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              rum eſſentia eſt ut ſint Loca: & loca primaria moveri abſurdum
                <lb/>
              eſt. </s>
              <s>Hæc ſunt igitur abſoluta Loca; & ſolæ tranſlationes de his lo­
                <lb/>
              cis ſunt abſoluti Motus. </s>
            </p>
            <p type="main">
              <s>Verum quoniam hæ Spatii partes videri nequeunt, & ab invi­
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              cem per ſenſus noſtros diſtingui; earum vice adhibemus menſuras
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              ſenſibiles. </s>
              <s>Ex poſitionibus enim & diſtantiis rerum a corpore ali­
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              quo, quod ſpectamus ut immobile, deſinimus loca univerſa: deinde
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              etiam & omnes motus æſtimamus cum reſpectu ad prædicta loca,
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              quatenus corpora ab iiſdem transferri concipimus. </s>
              <s>Sic vice loco­
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              rum & motuum abſolutorum relativis utimur; nec incommode in
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              rebus humanis: in Philoſophicis autem abſtrahendum eſt a ſenſibus. </s>
              <s>
                <lb/>
              Fieri etenim poteſt, ut nullum revera quieſcat corpus, ad quod loca
                <lb/>
              motuſque referantur. </s>
            </p>
            <p type="main">
              <s>Diſtinguuntur autem Quies & Motus abſoluti & relativi ab invi­
                <lb/>
              cem per Proprietates ſuas & Cauſas & Effectus. </s>
              <s>Quietis proprietas
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              eſt, quod corpora vere quieſcentia quieſcunt inter ſe. </s>
              <s>Ideoque
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              cum poſſibile ſit, ut corpus aliquod in regionibus Fixarum, aut longe
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              ultra, quieſcat abſolute; ſciri autem non poſſit ex ſitu corporum
                <lb/>
              ad invicem in regionibus noſtris, horumne aliquod ad longin-</s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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