Gassendi, Pierre
,
De proportione qua gravia decidentia accelerantur
,
1646
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Igitur, ſi acceleratio motus in deſcenſu grauium æquali
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bus spatiis æqualia ſumeret velocitatis incrementa, deberent
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neceſſariò ea ſpatia aut eodem, aut æquali tempore percurri.
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<
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">Tu Propoſitionem (nomine Aſſumptionis)
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falſam
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ac impoßibilem
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dicis: ſed tuo nimirum illo ſenſu;) de
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quo dicendum conſequenter) nam alio quidem, quem
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diuerſum ais, & Galileo, mihique tribuis, admittere
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verum, neceſſariumque cogeris, ob meum illud ratio
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cinium, cuius aliquam recitaſti partem. </
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<
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">Nihil verò
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ex eo repeto; cùm nemo non ſtatim peruideat poſſe
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Propoſitionem accipi in duplici caſu, Vno, ſi motus
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non acceleratus, ſed æquabilis ſit; Altero, ſi acceleratus,
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ſed æquabili tamen progreſſione. </
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<
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">Si primo enim,
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ſint duo mobilia, quorum alterum ſit velocius, & per
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currere debeat ſpatium duplò longius, quod ſit, verbi
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cauſsâ, duo ſtadia; manifeſtum eſt duo ab illo ſtadia,
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& vnum ab alio, eodem, aut æquali tempore percurri.
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<
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">Sin verò ſecundo, duo mobilia ſint, quorum motus
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continenter ſic acceleretur, vt celeritas vnius ſit conti
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nenter, ſeu tempore toto, aut eiſdem ſaltem partibus
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celeritatis alterius dupla, & ſpatium percurrendum ſit
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ſimiliter duplum, veluti rursùs duo ſtadia: manifeſtum
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iterum eſt, duo ab illo ſtadia, & vnum ab alio, eodem,
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aut æquali tempore percurri. </
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<
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">Ac Propoſitionem qui
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dem ego ſicſtabilio. </
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<
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">Reſtat, vt tu proponas caſum,
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qui exceptionem faciat, ac non eſſe veram vniuersè
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demonſtres. </
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<
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">Porrò nullum habes, præter tuum ſen
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ſum, ſeu ipſam quæſtionem, atque concluſionem, de
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qua controuerſiam Galileo facis; neque vllum tibi ad
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eum conuincendum argumentum ſuppetit, quàm ipſa </
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