Casati, Paolo, Terra machinis mota : dissertationes geometricae, mechanicae physicae hydrostaticae

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1eſt——(1/12), quæ per numerum partium̨
100000 ducta dat totam vini leuitatem——
8333 1/3. Si igitur inuentæ ſingularum par­
tium grauitates ſeu leuitates in ſummam re­
digantur, erit ſumma——8756 2/3 defectiuą
indicans totius dolii leuitatem in aquâ, ſeu
differentiam, qua aquæ grauitas excedit dolii
grauitatem in aëre. Nam ſi aquæ grauitas
5 1/3 ducatur per 3 fit 16, ducta per 400 dat
2133 1/3, ducta per 100000 dat 533333 1/3; quæ
in ſummam redactæ dant totam aquæ graui­
tatem 535482 2/3, à qua deficit dolii grauitas
particulis 8756 2/3. Id quod conſtabit, ſi par­
tium dolii grauitatem in aëre examinemus;
ligni enim partes 400 per ſpecificam graui­
tatem 4 ductæ dant abſolutam ligni grauita­
tem 1600; iterum partes 100000 vini per gra­
uitatem ſpecificam 5 1/4 ductæ dant abſolutam
vini grauitatem 525000: demum partes 3
ferri per 42 ductæ dant totam grauitatem
ferri 126: quæ ſi in ſummam redigantur, erit
tota dolii grauitas in aere 526726. Hæc au­
tem grauitas ſubducta ex grauitate aquæ æ­
qualis relinquit eandem differentia ——8756 2/3

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