Gassendi, Pierre, De proportione qua gravia decidentia accelerantur, 1646

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              <s id="s.000612">XXX. </s>
              <s id="s.000613">Proſequeris deinde ſic.
                <emph type="italics"/>
              Porrò cùm celeritas
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              motus in naturali deſcenſu grauium, non modò ad locum, ſed
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              ad tempus quoque reſpectum includat, iamque de altero
                <expan abbr="dictã">dictam</expan>
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              ſit, qua videlicet ratione, celeritas ſpatijs æqualibus augea­
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              tur; vt ne quid ad perfectam motus accelerati notitiam de­
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              ſit, neceſſarium eſt, vt de ſpatiis quoque, quæ temporibus
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              æqualibus percurruntur, quam inter ſe rationem obſeruent,
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              reliqua diſputatione inquiramus, & ex iiſdem quoque expe­
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              rientiis definiamus.
                <emph.end type="italics"/>
              </s>
              <s id="s.000614"> Hoc iam loco, optimè Vir, agnoſ­
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              cere potes originem mali. </s>
              <s id="s.000615">Nempe labes tota vide­
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              tur ex definitione vulgari contracta, quatenus ratio­
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              nem increſcentis celeritatis ita cum ſpatio comparat,
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              vt nullam interim inſtituat comparationem cum tem­
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              pore, ſine quo tamen neque celeritas, neque acce­
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              leratio intelligi poteſt. </s>
              <s id="s.000616">Non modò certè Ariſtoteles,
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              verùm etiam communis ſenſus id Velox definit,
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              quod ſpatium multum tempore pauco:
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              & Tardum,
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              quod
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              paucum multò conficit;
                <emph.end type="italics"/>
              conſtatque aliunde, ſi velocitas
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              attendatur ſolùm penes ſpatia, debere ſemper id
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              mobile, quod decem percurrerit ſtadia, dici moueri
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              celeriter, & ſemper id, quod vnicum percurrerit, tar­
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              dè; cùm contingere tamen poſſit, vt quod percurrit
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              vnicum, moueatur decuplo velocius, quàm illud,
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              quod percurrit decem. </s>
              <s id="s.000617">Ex quo fit, vt cùm celeri­
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              tas nihil ſit aliud, quàm paſſio motus; intelligatur
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              quidem motus abſolutè ſumptus ex relatione ad ſpa­
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              tium, cùm & definiatur progreſſio è loco in locum
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              (nulla mentione temporis) & duo loca ſine ſpatio
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              interiecto non accipiantur; at celeritas non intelli­
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              gatur ſine relatione ad tempus, & illud quidem breue </s>
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