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

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              <s id="s.000482">
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              ſtincta, vocibus monoſyllabis cuique illorum ſigilla­
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              tim aſſignatis ſigniſicarem: verùm memini rem ad te
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              perſcriptam; & circa hæc nimius iam ſum. </s>
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            <p type="main">
              <s id="s.000483">
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              De Experimentis circa ictum, impetumue grauium caden­
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              tium, ad explorandum impetus-ne vt ſpatium increſcat.
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                <emph.end type="center"/>
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              <s id="s.000484">XIX. </s>
              <s id="s.000485">Venio igitur ad Poſterius caput, ſecun­
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              damue partem tuæ Diſſertationis; in qua ſcilicet re­
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              cepiſti te veram, ac certam de Motu accelerato ſcien­
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              tiam falſæ, ac incertæ Galileanæ ſubſtituturum; & in
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              qua profeſſus te iterùm omnia, quæ ab illo conſcri­
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              pta ſunt, falſa, ac inania eſſe demonſtraturum; prouo­
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              cas me primum ad
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              clara, facilia, indubitata experimenta:
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              tametſi ego tenuitatis conſcius perſonam Arbitri, lu­
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              diciſque, quam mihi humaniſſimè iteratò defers, re­
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              cuſo; iteratò profeſſus nihil aliud à me, quàm rationes
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              quaſdam dubitandi exſpectari poſſe. </s>
              <s id="s.000486">Et
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              prima qui­
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              dem experientia petitur,
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              inquis,
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              ex impetu, quo globus,
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              aut graue aliud corpus quodcumque per aërem sponte natu­
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              ræ deorsùm cadit, ac percutit. </s>
              <s id="s.000487">Indubitatum enim eſt,
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              pergis,
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              quod ipſemet
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              G
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              alileus paßim agnoſcit, tantam præ­
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              ciſe percutientis corporis eſſe velocitatem, quantus impetus,
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              quantaque ipſa percußio fuerit. </s>
              <s id="s.000488">Impetus enim omnis, &
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              percußio ex velocitate est; imò impetus ipſe velocitas est,
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              nulloque hæc abinuicem diſcrimine dirimuntur, vt meritò, pro­
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              inde, qua ratione accreſcit velocitas, eadem impetus, & per­
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              cußio augeantur.
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              </s>
              <s id="s.000489"> Hactenus nihil eſt, quod non probem.
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              </s>
              <s id="s.000490">Proſequeris autem:
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              At facilè experientiâ conſtat corpus
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              graue quodcumque ex qualibet altitudine per aërem cadens,
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              & percutiens, vt libet, perpetuò ex altitudine dupla duplo
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              </s>
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