Archimedes
,
Archimedis De iis qvae vehvntvr in aqva libri dvo
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FED. COMMANDINI
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figuræ centrum.</
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<
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<
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no per axem ducto;
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</
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<
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">quod ſectionem faciat circulum,
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ellipſim a b c d, cuius
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diameter, & </
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<
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Dico e grauitatis etiam centrum eſſe. </
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<
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plano per e, ad planum ſecans recto, cuius fectio ſit circu-
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lus circa diametrum a c. </
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<
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">erunt a d c, a b c dimidiæ portio-
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nes ſphæræ, uel fphæroidis. </
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<
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<
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">quoniam portionis a d c gra
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uitatis centrum eſt in linea d, & </
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<
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ipſa b e; </
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">totius ſphæræ, uel ſphæroidis grauitatis centrum
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in axe d b conſiſtet. </
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tatis ponatur eſſe f. </
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<
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">fiat ipſi f e æqualis e g: </
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tionis a b c centrum erit. </
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titionem</
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æqualibus inter ſe aptatis, & </
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ter fe aptentur neceſſe eſt. </
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<
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medis.</
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ex utriſque cõſtat, hoc eſt ipſius ſphæræ, uel ſphæroidis gra
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uitatis centrum ſitin medio lineæ f g, uidelicet in e. </
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ræ igitur, uel ſphæroidis grauitatis centrum eſtidem, quod
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centrum figuræ.</
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