Valerio, Luca, De centro gravitatis solidorvm libri tres

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1ab eo non æqualiter diſtantibus: & axis portionis ſit EF,
qui per centrum G tranſibit, vtpote parallelorum circu­
lorum centra iungens: cumque eorum vtrumque ſit à cen­
tro non æqualiter diſtantium perpendicularis, erunt eius
ſegmenta EG, GF, inæqualia.
Eſto EG, maius: ſectoque
axe EF bifariam in puncto P, ſumptisque ipſarum EG,
GF, quartis partibus EH, FK, ſecetur interiecta KH,
in puncto Q, ita vt KQ, ad QH, ſit vt cubus ex EG,
ad cubum ex GF, & portionis ABCD, ſit centrum gra
uitatis R: quod quidem cum punctis P, Q, eſſe in axe
122[Figure 122]
EF: & cylindro LM, ſuper baſim æqualem circulo ma­
ximo circa axim EF, portioni circumſcripto, reliqui eius
dempta ABCD, portione centrum grauitatis eſse Q, &
propinquius E puncto, quàm centrum grauitatis R por­
tionis ABCD, manifeſtum eſt ex ſupra demonſtratis de
maioris portionis ſphæræ centro grauitatis: portionis autem
ABCD centrum grauitatis R eſse in ſegmento EG ſe­
quitur ex antecedente.
Dico PQ ad QR eſse vt ad axim
EF exceſsus, quo axis EF ſuperat tertiam partem com­
poſitæ duabus minoribus extremis altera reſpondente
maiori extrema EG in proportione continua ipſius NG

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