Ghetaldi, Marino
,
Marini Ghetaldi Promotvs Archimedis sev de varijs corporum generibus grauitate & magnitudine comparatis
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triplicatam rationem habet eius, quam C, ad diametrum ſphæræ B, ergo vt grauitas H, ad grauitatem G, ita erit cubus ex C, ad cubum
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ex diametro ſphæræ B, ſed vt grauitas H, ad grauitatem G, ita eſt cu
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bus ex C, ad cubum ex F, ergo cubus ex F, æqualis erit cubo diame-
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tri ſphæræ B; </
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ta igitur eſt quantitas diametri liquidæ ſphæræ B, quod facere opor-
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tebat.</
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magnitudinis, & </
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alicuius liquidi, grauitatem habentis propoſito corpori
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ſolido æqualem.</
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10, & </
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tis æqualem propoſito plumbo A, accipiatur aliquod corpus plumbeũ
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D, cuius grauitas 23, deinde aquæ magnitudinem habentis æqualem
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plumbo D, inueniatur grauitas, vt in exemplo propoſ. </
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quæ ſit 2, & </
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igitur indicabit quanta erit magnitudo aquæ grauitatem habentis
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æqualem propoſito plumbo A.</
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te ſphæricum, cuius ſphæræ diameter ſit 10, & </
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nire quanta erit diameter ſphæræ ex aqua, grauitatem haben-
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tis æqualem propoſitæ ſphæræ A, ita faciendum erit.</
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uitas 23, deinde aquæ habentis magnitudinem æqualem plumbo D,
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inueniatur grauitas quæ ſit 2, & </
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eſt 1000, ad alium numerum qui ſit 11500, is igitur numerus erit
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cubus diametri ſpbæræ ex aqua grauitatem habentis æqualem propo-
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ſitæ ſpbæræ A, quare eius latus cubicum, quod est 22 {57/100}, proximũ
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vero indicabit ipſam diametrum.</
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alicuius alterius formæ regularis, eadem ratione inueniemus latus cu
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bi ex aqua grauitatem habentis æqualem propoſito cubo A, nam ſi cu-
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bi A, datum ſit latus 10, erit numerus 11500, cubus ex aqua æqualis
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grauitate propoſito cubo A, quare latus cubicum numeri 11500, </
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