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

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1ducatur per 4, erit grauitas molis aqueæ
æqualis 400. Cum itaque grauitas aquæ ad
grauitatem molis confla ex 3/4 argillæ & 1/4
ignis, ſit vt 400 ad 311, conſtat molem̨
conflatam innataturam.
Gal. Quin aquæ grauitatem in aëre po­

tiùs, quàm in igne, conſideras?
An timui­
ſti, ne globus hic ex aëre communi in purio­
rem æthera auolaret?
Quando quidem ſi le­
uitas aeris ad aquam eſt——5 1/3, & leuitas
ignis ad aquam eſt——100, leuitas ignis ad
aërem eſt——94 2/3: eſt autem argillæ grauitas
in aëre 9. Igitur tres orbis quadrantes ha­
berent grauitatem vt 27, & reliquus qua­
drans leuitatem vt——94 2/3, atquè adeo totus
orbis leuitatem haberet in aere vt—— 67 2/3;
hoc eſt ſi per 4 numerum partium diuida­
tur, leuitas ſpecifica totius globi in aere eſ­
ſet——(16 11/12)
XXCVIII
Imò leuior
eſſet ſecun­
dùm ſpeciem
aëre.
Guld. Lynceus es, Galilæe, nihil noņ

vides.
Mirabar pariter, cur omiſsâ aquæ &
argillæ grauitate in aëre, confugerit Merſen­
nus ad earum grauitatem in igne; cum ta­
men ex aquâ emergens globus in aërem ve­
niat; qui eſt aquæ circumfuſus, non verò in
ignem.
Quemadmodum enim ſi mercurio

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