Commandino, Federico
,
Liber de centro gravitatis solidorum
,
1565
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<
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habebit maiorem
<
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abbr
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proportionẽ
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,
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quam cb ad ba. </
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<
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ut figura rectilinea ad portio
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nes. </
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<
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">cum igitur à circulo, uel el
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lipſi, cuius grauitatis centrum
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eſt b, auferatur figura rectilinea
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efghklmn, cuius centrum a;
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reliquæ magnitudinis ex portio
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marg23
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nibus compoſitæ centrum graui
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tatis erit in linea ab producta,
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& in puncto o, extra figuram po
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ſito. </
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<
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do poſſe perſpicuum eſt. </
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<
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id
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tur ergo, ut circuli & ellipſis cen
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trum grauitatis ſit punctum a,
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idem quod figuræ centrum.</
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8. quinti</
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19. quinti
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apud
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Cãpanum
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panum</
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.</
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8. Archi
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medis.</
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<
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">Sit circulus, uel ellipſis abcd,
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cuius diameter db, & centrum e:
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ducaturq;
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per e recta li
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nea ac, ſecans ipſam db ad rectos angulos. </
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<
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abc circuli, uel ellipſis dimidiæ portiones. </
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niam por
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tiõis
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adc
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cẽtrũ
">centrum</
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gra
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uitatis eſt
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in diame
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tro de: &
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portionis
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abc cen
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trum eſt
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ĩ
">im</
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ipſa eb: to
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tius circu
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li, uel ellipſis grauitatis centrum erit in diametro db. </
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<
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id
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">Sit autem portionis adc
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cẽtrum
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grauitatis f: & ſumatur </
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