Gassendi, Pierre
,
De proportione qua gravia decidentia accelerantur
,
1646
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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. </
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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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<
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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. </
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<
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">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. </
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<
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">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. </
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<
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">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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<
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<
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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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