Valerio, Luca, De centro gravitatis solidorvm libri tres
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Sit ſphæræ cuius centrum D maior portio ABC, cu­
ius axis BE, baſis circulus cuius diameter AC, & por­
tioni ABC, cylindro XH circa axim BE circumſcripto
vt ſupra fecimus: quoniam tam portionis ABC, quàm
cylindri XH, centrum grauitatis eſt in axe BE; erit reli­
qui ex cylindro XH, in axe BE centrum grauitatis, ſint
in axe BE centra grauitatis Q portionis ABC & S præ­
dicti reſidui.
Dico eſſe punctum S vertici B propinquius
117[Figure 117]
quàm punctum que Per centrum enim D tranſiens planum
ad axim BE erectum ſecet cylindrum XH, & portionem
ABC in duos cylindros KH, XL, & hemiſphærium
KBL, & portionem AKLC, ſectio autem circulus ma­
ximus eſto ille cuius diameter KL: & duo coni rectan­
guli circa axes BD, DE, vertice D communi deſcri­
bantur GDH, MDN, quorum alterius baſis GH com­
munis erit cylindro XH: alterius autem MDN, minor
quàm eiuſdem cylindri XH, baſis GH.
Denique ſecta

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