Ghetaldi, Marino
,
Marini Ghetaldi Promotvs Archimedis sev de varijs corporum generibus grauitate & magnitudine comparatis
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53
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affirmare ipſum vas eſſe plenum, niſi aqua incipiat effluere,
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cum autem incipit, effluit aliquando totus ferè cumulus, ita-
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que vel plus aquæ additur eo, quod deficit, vel minus, niſi
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coniectura aſſequatur: </
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<
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echoid-s1018
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xml:space
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">at vero coniectura pro veritate non ac-
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cipitur. </
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<
s
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xml:space
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">præterea exempta corona, vel aurea maſſa, vel argen-
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tea, eximitur etiam ſimul cum ipſa aliquantum aquæ, quæ cir-
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cum ipſam remanet, atque huiuſmodi defectus errorem indu-
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cit ſenſibilem.</
s
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<
s
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</
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<
s
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echoid-s1021
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xml:space
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">Neque per collectionem quæſita aquæ menſura inueniri
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poteſt:</
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<
s
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xml:space
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">æquè enim impoſſibile eſt vniuerſam illam æquam col-
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ligere, quæ extra vas effluit, quando corona, vel aurea maſſa
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vel argentea in ipſo vaſe deprimitur, cum enim aqua è vaſe
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effluat, pars ipſius aquæ vaſi, ex quo effluit, pars vaſi in quod
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influit adhæret, & </
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<
s
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">ſi vniuerſa omnino ſemper non colligatur,
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erit non parui erroris cauſa, præter quam quod, non ſemper
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adeo facile inuenitur par auri, argentique maſſa, quando co-
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rona, vel alia auri maſſa, quæ examinanda proponitur, medio-
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crem excederet magnitudinem.</
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</
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<
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<
s
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xml:space
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">Neque præterea poteſt diſcerni prædicta argenti portio in
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aliqua auri parua maſſa, differentiæ enim aquarum, quæ ex-
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tra vas effluunt, ſunt adeo exiguæ, vt ne cognoſci quidem
<
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poſſint, quod ſi cognoſcerentur, non ſemper erunt veræ,
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ſiquidem non ſemper in vaſis medio in cumulum creſcens
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æqualis aquæ copia remanet, ſed maior interdum, inter-
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dum minor, vt conſpicitur. </
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<
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">fit enim vt aliquando cumulus
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ille frangatur pluribus in locis, & </
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<
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">ideo aqua diffundatur, vt
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ferè nihil ipfius cumuli ſuperſit, aliquando vero frangatur
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in vno tantum loco, & </
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<
s
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xml:space
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">aqua colligens ſe in cumulum, parum
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diffluat.</
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<
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</
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<
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<
s
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">Sed ponderandis corporibus in aere & </
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<
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">aqua, eo modo, quo
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dictum eſt in fine exempli prop. </
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<
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">8. </
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<
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">inuenitur quæſita aquæ,
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grauitas, ita exactè, vt requiritur, ſiue ſit corpus illud paruum,
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ſiue magnum nihil intereſt, & </
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<
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">præterea facillima eſt operatio,
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nec adinueniendæ ſunt auri, & </
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<
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">argenti maſſæ æque graues, </
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