Gassendi, Pierre
,
De proportione qua gravia decidentia accelerantur
,
1646
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enim quia Galileus, ſupponendo eſſe à Luna in cen
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trum terræ milliaria 196000. ratiocinatur globum
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ferreum è Luna dimiſſum peruenturum ad centrum
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Terræ intra horas 3. & minuta 22. cum ſecundis 4.
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quatenus ex obſeruatione ab eo peracta decidit ini
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tio, intra ſecunda quinque, centum cubitis; ac perre
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cturus eſt deinceps iuxta progreſſionem ab eo aſſi
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gnatam: idcircò tu illa milliaria diuidens in pedes
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980000000 (quanquam Galileus non pedes vſurpa
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uit, ſed cubitos, quorum numerus foret 588000000)
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& numerum reducens in pedum centena 9800000,
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aſſumis 100 pedes (aſſumpſit ille ex obſeruatione 100
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cubitos, qui continent pedes (166 2/3)) pro ſpatio, quod
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percurritur quinque ſecundis, ſeu tempore vno, qua
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lia ſunt duodecim in vno minuto, & 24 in duobus mi
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nutis: ac tum extendendo 24. hæc tempora, tribuis
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primo 100, ſecundo 200, tertio 400, quarto 800, at
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que ita ingeminando, quovſque vigeſimo quarto tri
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buas 838860800: & colligis poſtea omnium ſum
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mam 1677721500, numerum videlicet pedum, qui
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percurruntur intra duo minuta. </
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<
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longè plures, quàm in prædicto ſpatio à Luna ad cen
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trum teriæ aſſignentur, concludis fore, vt
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prædictus glo
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bus in eo deſcenſu à Luna vſque ad
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Terræ, duo prima
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horæ minuta, ſiue trigeſimam vnius horæ partem non inſu
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meret:
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ac iubes me
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videre, quàm dispar celeritatis ratio in
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ter vtrumque calculum inueniatur.
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<
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aſſequor, debet globus ferreus cadere per te à Luna in
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centrum aut vno minuto, & quinquaginta ſeptem </
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