Fabri, Honoré, Tractatus physicus de motu locali, 1646

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              ſuperat reſiſtentiam impedimenti, quæ habet maiorem proportionem
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              virium cum reſiſtentia, quàm quæ minorem. </s>
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              Scholium.
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              <s id="N15CC1">Si quando appellandum erit aliquod Axioma vel Theorema lib. 1.ci­
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              tabitur Liber. </s>
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              <s id="N15CC8">
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              Theorema
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              1.
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              </s>
            </p>
            <p id="N15CD5" type="main">
              <s id="N15CD7">
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              Datur motus localis naturalis, iſque ab intrinſeco.
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              <s id="N15CDE"> Probatur; corpus gra­
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              ue mouetur localiter deorſum per hypoth. </s>
              <s id="N15CE3">hic motus eſt ab intrinſeco,
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              quod probatur; </s>
              <s id="N15CE9">non eſt ab vllâ causâ extrinſecâ; igitur eſt ab intrinſeca
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              per Ax.4. antecedens probatur inductione factâ omnium extrinſecorum. </s>
              <s id="N15CEF">
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              Primò non eſt à cauſa prima, vt aliquis fortè minùs prudenter, & magis
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              piè, quàm par ſit, diceret; </s>
              <s id="N15CF6">quia ille effectus tribui tantùm debet cauſæ
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              primæ, qui nullam habere poteſt cauſam ſecundam applicatam, vt patet; </s>
              <s id="N15CFC">
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              ſed hic effectus poteſt habere cauſam ſecundam applicatam, quam aſſi­
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              gnabimus infrà; </s>
              <s id="N15D03">deinde cauſa prima agit tantùm naturaliter iuxta exi­
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              gentiam cauſarum ſecundarum; </s>
              <s id="N15D09">igitur ideo moueret corpus graue deor­
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              ſum; </s>
              <s id="N15D0F">quia tunc motum corpus graue exigeret; </s>
              <s id="N15D13">ſed hoc mihi ſufficit, vt
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              dicatur hic motus eſſe ab intrinſeco; </s>
              <s id="N15D19">præterea, ſi dicatur Deus mouere
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              corpus graue deorſum iuxta illius exigentiam, dicetur etiam tùm cale­
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              facere, tùm illuminare, ad exigentiam ignis; </s>
              <s id="N15D21">quippe tàm mihi ſenſibile
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              eſt corpus graue deſcendere ſine vi impreſſa ab extrinſeco, quàm ignem
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              calefacere, & ſolem lucere ſine vi extrinſeca; </s>
              <s id="N15D29">adde quod illud ſolenne
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              eſt naturæ inſtitutum, vt id, quod exigit res aliqua ad finem ſuum conſe­
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              quendum, per virtutem intrinſecam poſſit ponere, ſi dumtaxat excipias
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              concurſum diuinum, & ipſam conſeruationem; </s>
              <s id="N15D33">ſic animal exigit vide­
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              re, audire, ſentire, moueri; </s>
              <s id="N15D39">igitur habet virtutem intrinſecam, per quam
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              videat, audiat, & moueatur; </s>
              <s id="N15D3F">ſic ignis exigit calefacere, lucere; </s>
              <s id="N15D43">aër, vel aqua
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              frigefacere, quidquid tandem ſint iſtæ qualitates, de quibus alibi; </s>
              <s id="N15D49">ſic
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              demum corpus graue exigit moueri deorſum; quis enim neget corpori
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              graui tàm natiuum eſſe tendere deorſum, cum ſcilicet corpus leuius ſub­
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              eſt, quàm ſit animali progredi, vrere igni, lucere, &c. </s>
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            <p id="N15D53" type="main">
              <s id="N15D55">Denique ſatis eſt mihi, vt dicatur aliquid cauſa, Phyſicè loquendo, ſi
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              ex illius applicatione ſemper ſequatur effectus; </s>
              <s id="N15D5B">nam non nego poſſe fie­
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              ri effectus omnes, qui noſtris ſenſibus ſubiiciuntur, ſaltem extrinſecos,
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              eſſe à cauſa prima, quippe ſi ſemper ex ignis applicatione Deus diffun­
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              deret lucem, & calorem, quem ſolus ipſe produceret, igne ipſo inerte re­
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              licto, nullam prorſus mutationem perciperemus; </s>
              <s id="N15D67">& nemo eſſet, qui non
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              exiſtimaret lucem hanc & calorem hunc eſſe ab igne; </s>
              <s id="N15D6D">igitur Phyſicè lo­
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              quendo cauſam appellamus id, ex cuius applicatione ſemper ſequitur
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              effectus, vt iam diximus in Ax. 11.l.1. n.1. Igitur cum ex corpore graui
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              poſito in aëre libero ſequatur motus deorſum; dicendum eſt, Phyſicè lo­
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              quendò, eſſe huius motus cauſam, id eſt in ordine ad Phyſicam, perinde
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              omninò ſe habere, atque ſi eſſet cauſa, licèt cauſa non eſſet. </s>
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