Gassendi, Pierre
,
De motu impresso a motore translato epistulae duae
,
1642
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puſillus, tametſi vnâ vnciâ ponderoſior non ſit, non
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minore velocitate, quàm ingens, tametſi ſit cen
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tum, & plurium librarum. </
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<
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">Videlicet pluribus qui
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dem chordulis attrahitur ingens, ſed plureis etiam par
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ticulas attrahendas habet; adeò vt fiat commenſura
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tio inter vim, ac molem, & ex vtraque vtrobique
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tantum ſit, quantum ad motum ſufficit eodem tem
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pore peragendum. </
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id
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">Id permirum; ſi globi fuerint ex
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diuerſa materia, vt alter plumbeus, alter ligneus,
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vix quicquam tardiùs attingi Terram ab vno, quàm
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ab alio, hoc eſt à ligneo, quàm à plumbeo; quo
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niam pari modo fit commenſuratio, dum totidem
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particulis totidem chordulæ deſtinantur. </
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<
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">Et eſt nihil
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ominùs tantillum, tametſi prope modùm inſenſibile
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diſcrimen; quòd ob raritatem materiæ majorem,
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aër ſe non-nihil magis intermiſceat, non nihilque
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magis ad motum deorsùm reſiſtat. </
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<
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">Quæres obiter, quid-nam eueniret illi lapi
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di, quem aſſumpſi concipi poſſe in ſpatiis illis inani
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bus, ſi à quiete exturbatus aliqua vi impelleretur?
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<
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">Reſpondeo probabile eſſe, fore, vt æquabiliter, in
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deſinenter que moueretur; & lentè quidem, celeriter
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ve, proüt ſemel paruus, aut magnus impreſſus foret
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impetus. </
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">Argumentum verò deſumo ex æquabilita
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te illa motus horizontalis iam expoſita; cùm ille vi
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deatur aliunde non deſinere, niſi ex admiſtione mo
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tus perpendicularis; adeò vt, quia in illis ſpatiis nul
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la eſſet perpendicularis admiſtio, in quamcúmque
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partem foret motus inceptus, horizontalis inſtar eſ
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ſet, & neque acceleraretur, retardareturve, neque </
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