Newton, Isaac, Philosophia naturalis principia mathematica, 1713

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                  eoque pacto rarius ſemper evadens e regione intervallorum ac
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                  denſius e regione pulſuum, participabit eorundem motum. </s>
                  <s>Et
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                  quoniam pulſuum progreſſivus motus oritur a perpetua relaxa­
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                  tione partium denſiorum verſus antecedentia intervalla rariora;
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                  & pulſus eadem fere celeritate ſeſe in Medii partes quieſcentes
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                    <emph type="italics"/>
                  KL, NO
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                  hinc inde relaxare debent; pulſus illi eadem fere cele­
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                  ritate ſeſe dilatabunt undiQ.E.I. ſpatia immota
                    <emph type="italics"/>
                  KL, NO,
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                  qua
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                  propagantur directe a centro
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                  A
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                  ; adeoque ſpatium totum
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                  KLON
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                    <lb/>
                  occupabunt.
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                  Q.E.D.
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                  Hoc experimur in Sonis, qui vel monte
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                  interpoſito audiuntur, vel in cubiculum per feneſtram admiſſi ſeſe
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                  in omnes cubiculi partes dilatant, inque angulis omnibus audiun­
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                  tur, non tam reflexi a parietibus oppoſitis, quam a feneſtra directe
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                  propagati, quantum ex ſenſu judicare licet. </s>
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                <p type="margin">
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                  DE MOTU
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                  CORPORUM</s>
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                  <s>
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                  Cas.
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                  3. Ponamus denique quod motus cujuſcunque generis
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                  propagetur ab
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                  A
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                  per foramen
                    <emph type="italics"/>
                  BC
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                  : & quoniam propagatio iſta
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                  non fit, niſi quatenus partes Medii centro
                    <emph type="italics"/>
                  A
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                  propiores urgent
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                  commoventque partes ulteriores; & partes quæ urgentur fluidæ
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                  ſunt, ideoque recedunt quaquaverſum in regiones ubi minus pre-</s>
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