Valerio, Luca - De centro gravitatis solidorvm libri tres

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Sit pyramidis, cuius baſis parallelogrammum EFGH,
fruſtum ABCDEFGH, eiuſque axis KL, quo ſecto in pun
cto α ita vt K α ad α L, ſit vt laterum homologorum AD
EH, dupla ipſius EH vna cum AD ad duplam ipſius
AD vna cum EH, & fruſti ABCDEFGH ſit centrum
grauitatis nempe in axe KL. Dico punctum , cadere
infra punctum α. A punctis enim A,B,C,D, ducantur

96[Figure 96]
ad maiorem baſim axi KL, parallelæ AN, BO, CR, DS,
& parallelepipedum ABCDNORS compleatur, &
productis baſis NO lateribus, deſcriptæ ſint quatuor py
ramides AEMNZ, BOPFY, CGXRQ, DHVST,
quarum baſes erunt parallelogramma circa diametrum
æqualia, atque ſimilia: & quatuor priſmata triangulas ba
ſes habentia, quorum binorum ex aduerſo inter ſe reſpon-

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