Ghetaldi, Marino
,
Marini Ghetaldi Promotvs Archimedis sev de varijs corporum generibus grauitate & magnitudine comparatis
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dæ ſphæræ B, data diameter F, & </
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ta erit diameter ſolidæ ſphæræ A, ita faciendum erit.</
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<
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<
s
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">liquidi E, inuenta grauitate,
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vt dictum eſt, fiat vt grauitas G, ad prauitatem H, ita cubus ex F, ad
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alium cubum, cuius latus ſit C, Quoniam igitur eadem ratione qua
<
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ſupra oſtendetur, vt grauitas G, ad grauitatem H, ita eſſe magnitudi-
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nem ſphæræ B, ad ſphæræ A, magnitudinem, ſed magnitudo ſphæræ B,
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ad magnitudinem ſphæræ A, triplicatam rationem habet eius,
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F, diameter ſphæræ B, ad diametrum ſphæræ A, ſimiliter, & </
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F, ad cubum ex diametro
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ſphæræ A, triplicatã rationem habet
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quam F, ad diametrum ſphæræ A, ergo, vt grauitas G, ad grauitatĕ
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H, ita erit cubus ex F, ad cubum ex diametro ſphæræ A, ſed vt graui-
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tas G, ad grauitatem H, ita eſt cubus ex F, ad cubum ex C, ergo cubus
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ex C, æqualis erit cubo diametri ſphæræ A, quare, & </
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<
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tur ipſius ſphæræ A, diametro, inuenta igitur eſt quantitas diametri
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ſolidæ ſphæræ A, quod facere oportebat.</
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magnitudinis, & </
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tudo alicuius ſolidi grauitatem habentis propoſi-
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to corpori liquido æqualem.</
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& </
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bentis æqualem propo ſitæ aquæ B, accipiatur aliquod corpus plumbeũ
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D, cuius grauitas ſit verbi gratia 23, deinde aquæ magnitudinem ha-
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bentis æqualem plumbo D, inueniatur grauitas quæ ſit 2. </
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cuit propoſitionis octauæ exemplum, & </
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alium numerum qui ſit 10, is igitur numerus indicabit quanta erit
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magnitudo plumbi grauitatem habentis æqualem propoſitæ aquæ B.</
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<
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">Quod ſi propoſitum corpus aqueum B, ſit ſphæricum, cuius
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ſphæræ diameter ſit 10, & </
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meter ſphæræ ex plumbo, grauitatem habentis æqualem pro-
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poſitæ ſphæræ B, ita faciendum erit.</
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& </
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