Commandino, Federico
,
Liber de centro gravitatis solidorum
,
1565
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in linea eb
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g, ita ut fit ge æqualis ef. </
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tionis abc centrum. </
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& ſimiles ſunt, inter ſe ſe aptentur, ita ut be cadat in de,
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& punctum b in d cadet, & g in f: figuris autem æquali
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bus, & ſimilibus inter ſe aptatis, centra quoque grauitatis
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ipſarum inter ſe aptata erunt, ex quinta petitione Archi
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medis in libro de centro grauitatis planorum. </
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portionis adc centrum grauitatis ſit f: & portionis
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abc centrum g: magnitudinis; quæ ex utriſque efficitur:
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hoc eſt circuli uel ellipſis grauitatis centrum in medio li
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neæ fg, quod eſt e, conſiſtet, ex quarta propoſitione eiuſ
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dem libri Archimedis. </
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<
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">ergo circuli, uel ellipſis centrum
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grauitatis eſt idem, quod figuræ centrum. </
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quod demonſtrare oportebat.</
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ſis, quæ dimidia maior ſit, centrum grauitatis in
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diametro quoque ipſius conſiſtere.</
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<
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i
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us diameter bd, & com
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pleatur circulus, uel ellipſis, ut portio reliqua fit aec, </
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