Ghetaldi, Marino, Marini Ghetaldi Promotvs Archimedis sev de varijs corporum generibus grauitate & magnitudine comparatis

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5211Diametri \\ magnitu. #### Aureæ Sphæræ \\ grauitas. #### Plumbeæ Sphæræ \\ grauitas. #### Argĕteæ ſphęræ \\ grauitas.
# Lib. # Vn. # Scr. # Gran. # Lib. # Vn. # Scr. # Gra. # Lib. # Vn. # Scr. # Gra.
11 # 601 # 2 # 13 # 21 {31/37} # 363 # 10 # 17 # 6 {10/37} # 326 # 11 # 17 # 5 {29/111}
11 {1/4} # 643 # 1 # 17 # 22 {11/37} # 389 # 3 # 6 # 10 {25/74} # 349 # 9 # 8 # 21 {30/37}
11 {1/2} # 686 # 11 # 18 # 18 {14/37} # 415 # 9 # 15 # 18 {26/37} # 373 # 7 # 11 # 1 {17/111}
11 {3/4} # 732 # 9 # 4 # 14 {29/37} # 443 # 6 # 4 # 16 {39/74} # 398 # 6 # 6 # 7 {22/111}
12 # 780 # 6 # 11 # 16 {8/37} # 472 # 5 # 4 # 12 {36/37} # 424 # 6 # 1 # 7 {5/37}
erit gran.
513. & ſic reliquarum ſpbærarum ex ſtanno, diametros ba- bentium magnitudine quacunque, inuenientur grauitates.
Aliter quoque & expeditius reliquarum ſphærarum ex ſtanno in-
uenientur grauitates.
Inuenta grauitate ſpbæræ, diametrum babentis {1/4}, vnciæ, ſi mul-
tiplicetur ipſa grauitas, per 8, boc est per cubum ex 2, numerus pro-
ductus dabit grauitatem ſphæræ, diametrum babentis {2/4}, vnciæ, boc
2218. 12.
Elem.
eſt {1/2}, ſpbæræ * enim inter ſe in triplicata ſunt ratione ſuarum dia-
metrorum.
deinde ſi multiplicetur eadem grauitas per 27, boc est per
cubum ex 3, numerus productus dabit grauitatem ſpbæræ, babentis
diametrum {3/4}, vnciæ, &
ſi multiplicetur per 64, boc est per cubum
ex 4, numerus productus dabit grauitatem ſpbæræ, cuius diameter eſt
@, boc est vnius vnciæ, &
eo deinceps continuo ordine,
Porro ad inueniendas grauitates ſpbærarum ex reliquis metallis,
@ex quacunquæ alia materia, bæc erit ratio.
Fiat vt 1, ad 1 {41/74}, boc eſt vt 74, ad 115, (ſi degrauitate ſpbæræ
plũbeæ quæritur cuius diameter est {1/4}, vnciæ) ita 19.
grauitas vide-
licet ſpbæræ stanneæ diametrũ babentis {1/4}, vnciæ, ad aliũ numerum
qui ſit 29 {39/74}, grauitas igitur ſpbæræ plumbeæ, diametrum baben-
tis {1/4}, vnciæ, erit gran.
29 {39/74}. ſtannum enim ad plumbum rationem
babet in grauitate vt 1, ad 1 {41/74}, vt conſpicitur in prima tabella.
quam ad comparandum inter ſe duodecim corporum genera, grauita-
te, &
magnitudine, appoſuimus.
Si vero quæratur de grauitate ſpbæræ plumbeæ, diametrum.
babentis 2, vnciarum, fiat vt 74, ad 115, ita 9728, id est

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