Valerio, Luca, De centro gravitatis solidorum, 1604

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1neis connectantur, erunt binæ connectentes parallelæ, &
ab axe K L bifariam ſecabuntur, vt figuræ deſcriptio ina­
nifeſtat.
Totius igitur fruſti ABCDEFGH, centrum
grauitatis in linea γ δ cadet: ſed punctum γ cadit infra
punctum α, multo ergo inferius, & baſi EG propinquius
punctum quam punctum α. Quod demonſtrandum erat.
PROPOSITIO XXIV.
Omnis fruſti conici centrum grauitatis pro­
pinquius eſt maiori baſi quam punctum illud, in
quo axis ſic diuiditur, vt pars minorem baſim
attingens ſit ad reliquam, vt dupla diametri ma­
ior is baſis vna cum minoris diametro ad duplam
diametri minoris baſis vna cum diametro ma­
ioris.
Hoc eadem ratione deducetur ex antecedenti, qua cen­
trum grauitatis fruſti conici in extremo primo libro demon
ſtrauimus, quandoquidem ſimiliter vt ibi fecimus, omnis
pyramidis centro grauitatis idem probaremus accedere
quod prædictæ pyramidis in antecedente.
PROPOSITIO XXV.
Si ſint quotcumque magnitudines, & aliæ illis
multitudine æquales, binæque ſumptæ in eadem
proportione, quæ commune habeant centrum gra
uitatis, centra autem grauitatis omnium ſint in
eadem recta linea; primæ & ſecundæ tanquam

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