Gassendi, Pierre
,
De proportione qua gravia decidentia accelerantur
,
1646
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vera, & neceſſaria ſit; in motu tamen accelerato minime
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neceſſaria eſt, & non vno modo tantum, ſed pluribus in
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telligi potest, quo modo velocitates ſint inter ſe, vt emenſa
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ſpatia: licet eadem ſpatia neque eodem, neque æquali tem
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pore percurrantur.
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<
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id
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"> Pergis autem,
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Vt, ſi graue deſcen-
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dens per AB tempus quodcumque inſumat, putà qua
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drantem; ac deinde BC ipſi AB æquale, dimidio
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quadrante percurrat; quis neget in
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C
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duplam ha
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beri velocitatem eius, quæ fuit in B? & tamen
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idem graue totam AC, & dimidium eius AB
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non percurreret.
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<
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id
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"> Et hæc eſt quidem tota tua ad
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conuincendum paralogiſmi Galileum proba
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tio, ob quam continenter hæc verba ſubiun
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gis:
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Aſſumptio igitur Galilei falſa eſt, & tota eius
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ratiocinatio merus Paralogiſmus id óque nullo modo, vt ipſe
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gloriatur communem, ſanioremque aliorum ſenſum erroris
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reuincit, qui in naturali grauium deſcenſu volunt æqualibus
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spatijs æqualia velocitatis momenta acquiri.
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<
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id
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"> An verò pa
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tietur tua bonitas, ſi dicam poſſe cuipiam videri, eſſe
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te potiùs, qui hoc loco incidas in paralogiſmum? </
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<
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">Ni
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mirum videris ſic argumentari, vt id, quod contro
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uertitur, aſſumas pro principio, dum nihil aliud, quàm
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ſupponis ſpatium AB, percurri duplo temporis, quo
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ſpatium BC; & velocitatem in C, eſſe duplam eius,
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quæ fuit in B; quæ ipſa tamen eſt controuerſia. </
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<
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">Et
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cùm ſoluenda eſſet ratio, qua conficitur fore, vt AC
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percurratur eodem, aut æquali tempore, quo ſpatium
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AB, nihil aliud, quam concluſionem negas, fore di
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cendo, vt idem graue totam AC, & dimidium eius
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AB eodem tempore non percurreret. </
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<
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