Valerio, Luca, De centro gravitatis solidorvm libri tres

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1verticem habentibus communem centrum ſphæ­
ræ, baſes autem minores baſibus oppoſitis cylin­
dri circumſcripti: æqualibus circulo maximo, ſu­
mentes pro vertice minorem baſim, pro baſi, ma­
iorem baſim portionis immotis reliquis propoſi­
tum demonſtraremus.
PROPOSITIO XXXVIII.
Omnis maioris portionis ſphæræ centrum gra
uitatis eſt in axe primum bifariam ſecto: Deinde
ſumpta ad verticem quarta parte ſegmenti axis,
quod centro ſphæræ, & portionis vertice finitur:
itemque ad baſim quarta parte reliqui ſegmenti
inter centrum ſphæræ, & baſim portionis interie­
cti.
Deinde ſegmento axis, inter eas quartas par­
tes interiecto, ita diuiſo, vt pats propinquior baſi
ſit ad reliquam vt cubus ſegmenti axis, quod
centro ſphæræ, & vertice portionis, ad cubum eius
quod centris ſphæræ, & baſis portionis termina­
tur; in eo puncto, in quo ſegmentum axis centro
ſphæræ, & ſectione penultima finitum ſic diuidi­
tur, vt pars prima & penultima ſectione termina­
ta ſit ad totam vltima & penultima ſectione termi
natam, vt exceſſus, quo ſegmentum axis portionis
inter centrum, & baſim portionis interiectum ſu­
perat tertiam partem minoris extremæ maiori po
ſita dicto axis ſegmento in proportione ſemidia-

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