Newton, Isaac, Philosophia naturalis principia mathematica, 1713

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                  <s>
                    <pb xlink:href="039/01/185.jpg" pagenum="157"/>
                  eædem a viribus acceleratricibus ad alia corpora tendentibus, aut
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                    <arrow.to.target n="note133"/>
                  non urgentur niſi leviſſime, aut urgentur æqualiter & ſecundum li­
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                  neas parallelas quamproxime. </s>
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                <p type="margin">
                  <s>
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                  LIBER
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                  PRIMUS.</s>
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                  <s>
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                  PROPOSITIO LXVI. THEOREMA XXVI.
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                  </s>
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                <p type="main">
                  <s>
                    <emph type="italics"/>
                  Si Corpora tria, quorum Vires decreſcunt in duplicata ratione di­
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                  ſtantiarum, ſe mutuo trahant, & attractiones acceleratrices bi­
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                  norum quorumcunQ.E.I. tertium ſint inter ſe reciproce ut qua­
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                  drata diſtantiarum; minora autem circa maximum revolvan­
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                  tur: Dico quod interius circa intimum & maximum, radiis
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                  ad ipſum ductis, deſcribet areas temporibus magis proportio­
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                  nales, & Figuram ad formam Ellipſeos umbilicum in concur­
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                  ſu radiorum habentis magis accedentem, ſi corpus maximum
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                  his attractionibus agitetur, quam ſi maximum illud vel a mi­
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                  noribus non attractum quieſcat, vel multo minus vel multo ma­
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                  gis attractum aut multo minus aut multo magis agitetur.
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                  </s>
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                  <s>Liquet fere ex demonſtratione Corollarii ſecundi Propoſitionis
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                  præcedentis; ſed argumento magis diſtincto & latius cogente ſic
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                  evincitur. </s>
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                <p type="main">
                  <s>
                    <emph type="italics"/>
                  Cas.
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                  1. Revolvantur
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                    <figure id="id.039.01.185.1.jpg" xlink:href="039/01/185/1.jpg" number="107"/>
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                  corpora minora
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                  P
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                  &
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                  S
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                  in eodem plano circa
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                  maximum
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                  T,
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                  quorum
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                    <emph type="italics"/>
                  P
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                  deſcribat Orbem in­
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                  teriorem
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                  PAB,
                    <emph.end type="italics"/>
                  &
                    <emph type="italics"/>
                  S
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                    <lb/>
                  exteriorem
                    <emph type="italics"/>
                  SE.
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                  Sit
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                    <emph type="italics"/>
                  SK
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                  mediocris diſtan­
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                  tia corporum
                    <emph type="italics"/>
                  P
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                  &
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                  S
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                  ;
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                  & corporis
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                  P
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                  verſus
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                    <emph type="italics"/>
                  S
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                  attractio acceleratrix in mediocri illa diſtantia exponatur per e­
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                  andem. </s>
                  <s>In duplicata ratione
                    <emph type="italics"/>
                  SK
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                  ad
                    <emph type="italics"/>
                  SP
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                  capiatur
                    <emph type="italics"/>
                  SL
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                  ad
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                  SK,
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                  & e­
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                  rit
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                  SL
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                  attractio acceleratrix corporis
                    <emph type="italics"/>
                  P
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                  verſus
                    <emph type="italics"/>
                  S
                    <emph.end type="italics"/>
                  in diſtantia quavis
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                    <emph type="italics"/>
                  SP.
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                  Junge
                    <emph type="italics"/>
                  PT,
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                  eique parallelam age
                    <emph type="italics"/>
                  LM
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                  occurrentem
                    <emph type="italics"/>
                  ST
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                  in
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                  M,
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                    <lb/>
                  & attractio
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                  SL
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                  reſolvetur (per Legum Corol 2.) in attractiones
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                    <emph type="italics"/>
                  SM, LM.
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                  Et ſic urgebitur corpus
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                  P
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                  vi acceleratrice triplici: </s>
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