Ghetaldi, Marino
,
Marini Ghetaldi Promotvs Archimedis sev de varijs corporum generibus grauitate & magnitudine comparatis
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PROMOTVS
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<
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xml:space
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">Neque diſſimili ratione inuenietur magnitudo reliquo-
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rum omnium liquidorum, grauitate propoſito corpori cuiuſ-
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cumque generis liquidi, æqualium, quare dicta ſufficiant.</
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<
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">DVm adhucOpuſculum ſub prælo eſſet, dubitandi anſam,
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ex eo vir doctiſsimus, cui percurrendum illud tradi-
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deram, arripuit, quod ex grauitate, corporum in aqua
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exiſtentium, non poſſet vera ratio, quam habent diuerſa
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ipſorum corporum genera in grauitate, deprehendi, niſi
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corpora fuerint ſimilia. </
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<
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">ſi enim (aiebat) accipiantur duo
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corpora eiuſdem generis, & </
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<
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">grauitatis, quorum vnum ſit
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planum, alterum conicam formam habens, & </
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turin aqua, ita vt coni vertex deorſum verſus pendeat, baſis
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vero ipſius coni, & </
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<
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">latæ corporis plani ſuperficies æquidiſtent
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horizonti. </
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<
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">conus in aqua maiorem habebit grauitatem, cor-
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pore plano, quia corpus planum magis ab aqua ſuſtentatur,
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quam conus, & </
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">hoc quidem manifeſtum eſt, quoniam ſi am-
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bo demittantur eodem tempore in aquam, conus citius ad
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imum deſcendet, quam corpus planum. </
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<
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licet primo aſpectu probabilevideatur, tamen falſo concludit.
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<
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">verum eſt quod aqua ſuſtentat magis corpus planum, quam
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conum, ipſum tamen ſuſtentat, netanta velocitate feratur
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deorſum, non ideo ipſius grauitati aliquid detrahit, neque
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enim ex velociori motu ſimpliciter inferri poteſt maior gra-
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uitas, illud enim valeret etiam in aere, quod eſt falſum, ſed
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ne huiuſmodi dubitatio veritatis ſpecie aliquem decipiat, ſe-
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quenti Theoremate eam deſtruere agrediar.</
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quam aqua, etſi diſsimilia, æqualem in aqua
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grauitatem habent.</
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<
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quam aqua, & </
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grauitatem habere. </
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