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

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              <s id="s.001808">
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              longè eſſe videri, ſi, quod eſt dictum de motu perpe­
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              tuo globi ſupra planum ex facto ſemel vno impulſu,
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              aſſerat quis cælum continuò, æquabiliterque moueri,
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              quia in ſui à Deo creatione eam impulſionem acce­
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              perit, qua cœptus tunc motus etiam-num perduret. </s>
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            <p type="main">
              <s id="s.001809">
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              Incredibilem fore motus corporum decidentium ſegnitiem, ſi
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              vt incipit, ita pergeret: & Non ſolùm accelerationem,
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              ſed ipſum quoque initium motus eſſe à principio
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              externo.
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              <s id="s.001810">VIII. </s>
              <s id="s.001811">Dicis poſteà,
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              forè, vt mihi Eruditi omnes conce­
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              dant accelerationem eſſe violentam, ſi illam, vt quid ſuper­
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              ueniens, mente ſecernamus ab ipſo deſcenſu.
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              </s>
              <s id="s.001812"> Non eſt porrò
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              cur dubites, quin ipſe quoque mente ſecernam motum
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              illum ſimplicem, quo lapis fertur deorſum, quemque
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              tu deſcenſum appellas, ab omnibus, qui ſuperueniunt,
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              giadibus accelerationis. </s>
              <s id="s.001813">Quippe id abunde expreſſi,
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              cùm dixi
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              eum motum, ſecluſa acceleratione, fore ex ſe æqua­
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              bilem, ſed imperceptibilem tamen, ob incredibilem ſegnitiem.
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              Non eſt proinde etiam, cur hæreas, quin illum eſſe na­
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              turalem, & ſine reluctatione agnoſcam; quippe qui
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              eum faciam, quantum eſt ex ſe, æquabilem, perpetuum,
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              ac talem, qui ſit imprimendus etiam lapidi exſiſtenti
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              in vacuo, vbi mobile nullam habet ad motum repu­
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              gnantiam, quocumque verſum tandem agatur: verum
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              quòd eiuſmodi motus cenſeri naturalis poſſit, non id­
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              circò cenſeo caſum lapidis habendum eſſe naturalem.
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              </s>
              <s id="s.001814">Quoniam tametſi talis motus in hoc caſu interueniat,
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              euaneſcit tamen, ſiue nullus eſt, reſpectu accelerationis, </s>
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