Newton, Isaac, Philosophia naturalis principia mathematica, 1713

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                  <s>
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                  ea ſimplex eſſe ſoleat & ſibi ſemper conſona. </s>
                  <s>Extenſio corporum
                    <lb/>
                  non niſi per ſenſus innoteſcit, nec in omnibus ſentitur: ſed quia
                    <lb/>
                  ſenſibilibus omnibus competit, de univerſis affirmatur, Corpora
                    <lb/>
                  plura dura eſſe experimur. </s>
                  <s>Oritur autem durities totius a duritie
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                  partium, & inde non horum tantum corporum quæ ſentiuntur,
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                  ſed aliorum etiam omnium particulas indiviſas eſſe duras merito
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                  concludimus. </s>
                  <s>Corpora omnia impenetrabilia eſſe non ratione ſed
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                  ſenſu colligimus. </s>
                  <s>Quæ tractamus, impenetrabilia inveniuntur, &
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                  inde concludimus impenetrabilitatem eſſe proprietatem corporum
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                  univerſorum. </s>
                  <s>Corpora omnia mobilia oſſe, & viribus quibuſdam
                    <lb/>
                  (quas vires inertiæ vocamus) perſeverare in motu vel quiete, ex
                    <lb/>
                  hiſce corporum viſorum proprietatibus colligimus. </s>
                  <s>Extenſio, du­
                    <lb/>
                  rities, impenetrabilitas, mobilitas & vis inertiæ totius, oritur ab
                    <lb/>
                  extenſione, duritie, impenetrabilitate, mobilitate & viribus iner­
                    <lb/>
                  tiæ partium: & inde concludimus omnes omnium corporum par­
                    <lb/>
                  tes minimas extendi & duras eſſe & impenetrabiles & mobiles &
                    <lb/>
                  viribus inertiæ præditas. </s>
                  <s>Et hoc eſt fundamentum Philoſophiæ
                    <lb/>
                  totius. </s>
                  <s>Porro corporum partes diviſas & ſibi mutuo contiguas ab
                    <lb/>
                  invicem ſeparari poſſe, ex Phænomenis novimus, & partes indi­
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                  viſas in partes minores ratione diſtingui poſſe ex Mathematica
                    <lb/>
                  certum eſt. </s>
                  <s>Utrum vero partes illæ diſtinctæ & nondum diviſæ
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                  per vires Naturæ dividi & ab invicem ſeparari poſſint, incertum
                    <lb/>
                  eſt. </s>
                  <s>At ſi vel unico conſtaret experimento quod particula aliqua
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                  indiviſa, frangendo corpus durum & ſolidum, diviſionem patere­
                    <lb/>
                  tur: concluderemus vi hujus Regulæ, quod non ſolum partes di­
                    <lb/>
                  viſæ ſeparabiles eſſent, ſed etiam quod indiviſæ in infinitum dividi
                    <lb/>
                  poſſent. </s>
                </p>
                <p type="margin">
                  <s>
                    <margin.target id="note364"/>
                  DE MUNDI
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                  SYSTEMATE</s>
                </p>
                <p type="main">
                  <s>Denique ſi corpora omnia in circuitu Terræ gravia eſſe in Ter­
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                  ram, idque pro quantitate materiæ in ſingulis, & Lunam gravem
                    <lb/>
                  eſſe in Terram pro quantitate materiæ ſuæ, & viciſſim mare no­
                    <lb/>
                  ſtrum grave eſſe in Lunam, & Planetas omnes graves eſſe in ſe
                    <lb/>
                  mutuo, & Cometarum ſimilem eſſe gravitatem, per experimenta
                    <lb/>
                  & obſervationes Aſtronomicas univerſaliter conſtet: dicendum erit
                    <lb/>
                  per hanc Regulam quod corpora omnia in ſe mutuo gravitant. </s>
                  <s>
                    <lb/>
                  Nam & fortius erit argumentum ex Phænomenis de gravitate uNI­
                    <lb/>
                  verſali, quam de corporum impenetrabilitate: de qua utiQ.E.I.
                    <lb/>
                  corporibus Cœleſtibus nullum experimentum, nullam prorſus ob­
                    <lb/>
                  ſervationem habemus. </s>
                </p>
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