Ghetaldi, Marino
,
Marini Ghetaldi Promotvs Archimedis sev de varijs corporum generibus grauitate & magnitudine comparatis
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">Diametri \\ magnitu. #### Aureæ Sphæræ \\ grauitas. #### Plumbeæ Sphæræ \\ grauitas. #### Argĕteæ ſphęræ \\ grauitas.
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# Lib. # Vn. # Scr. # Gran. # Lib. # Vn. # Scr. # Gra. # Lib. # Vn. # Scr. # Gra.
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11 # 601 # 2 # 13 # 21 {31/37} # 363 # 10 # 17 # 6 {10/37} # 326 # 11 # 17 # 5 {29/111}
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11 {1/4} # 643 # 1 # 17 # 22 {11/37} # 389 # 3 # 6 # 10 {25/74} # 349 # 9 # 8 # 21 {30/37}
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11 {1/2} # 686 # 11 # 18 # 18 {14/37} # 415 # 9 # 15 # 18 {26/37} # 373 # 7 # 11 # 1 {17/111}
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11 {3/4} # 732 # 9 # 4 # 14 {29/37} # 443 # 6 # 4 # 16 {39/74} # 398 # 6 # 6 # 7 {22/111}
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12 # 780 # 6 # 11 # 16 {8/37} # 472 # 5 # 4 # 12 {36/37} # 424 # 6 # 1 # 7 {5/37}</
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erit gran. </
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">& </
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">ſic reliquarum ſpbærarum ex ſtanno, diametros ba- bentium magnitudine quacunque, inuenientur grauitates.</
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uenientur grauitates.</
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">Inuenta grauitate ſpbæræ, diametrum babentis {1/4}, vnciæ, ſi mul-
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tiplicetur ipſa grauitas, per 8, boc est per cubum ex 2, numerus pro-
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ductus dabit grauitatem ſphæræ, diametrum babentis {2/4}, vnciæ, boc
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eſt {1/2}, ſpbæræ * enim inter ſe in triplicata ſunt ratione ſuarum dia-
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metrorum. </
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">deinde ſi multiplicetur eadem grauitas per 27, boc est per
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cubum ex 3, numerus productus dabit grauitatem ſpbæræ, babentis
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diametrum {3/4}, vnciæ, & </
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">ſi multiplicetur per 64, boc est per cubum
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ex 4, numerus productus dabit grauitatem ſpbæræ, cuius diameter eſt
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@, boc est vnius vnciæ, & </
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@ex quacunquæ alia materia, bæc erit ratio.</
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<
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">Fiat vt 1, ad 1 {41/74}, boc eſt vt 74, ad 115, (ſi degrauitate ſpbæræ
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plũbeæ quæritur cuius diameter est {1/4}, vnciæ) ita 19. </
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licet ſpbæræ stanneæ diametrũ babentis {1/4}, vnciæ, ad aliũ numerum
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qui ſit 29 {39/74}, grauitas igitur ſpbæræ plumbeæ, diametrum baben-
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tis {1/4}, vnciæ, erit gran. </
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babet in grauitate vt 1, ad 1 {41/74}, vt conſpicitur in prima tabella.
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te, & </
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<
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">babentis 2, vnciarum, fiat vt 74, ad 115, ita 9728, id est </
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