Casati, Paolo
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Terra machinis mota : dissertationes geometricae, mechanicae physicae hydrostaticae
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leuitatem —— 89, quia in quatuor partes di
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ſtinctus ponitur (cum corpori leuiſſimo mo
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lem componenti 1/4 tribuatur) diuidatur 89
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per 4, & erit leuitas ſpecifica in aquâ——
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22 1/4: Si igitur grauitas aquæ in igne + 100 illi
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addatur, erit grauitas ſpecifica terreni globi
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in igne + 77 3/4. In quocunque igitur medio
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terrenus globus ſemper haberet ſpecificam
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grauitatem vt + 77 3/4 in medio leuiſsimo, hoc
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eſt in igne, ſi cæterorum corporum grauitas
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ad idem medium, hoc eſt ignem, compare
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tur. </
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>Quia verò aëris communis in igne gra
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uitas eſt † 94 2/3, grauitas autem ſpecifica glo
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bi terreni eſt † 77 3/4, ſequitur terreni globi ſpe
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cificam leuitatem in aëre communi eſſe——
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(16 11/12), quæ ſi per 4 numerum partium duca
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tur, dabit abſolutam globi leuitatem in aëre
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——67 2/3, vt Galilæus argumentabatur: tellus
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igitur aere leuior eſſet. </
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Merſ.
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<
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> Qui inter ſalebras ambulat, non
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ſemper ad numerum greſſus ponit. </
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<
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>Id I mihi
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quoquè contigiſſe videtur, qui non ſatis di
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lucidè verbis ſum complexus, quod vole
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bam. </
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tatem licebit meam mentem interpretari. </
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Toti huic globo, quem incolimus, aquam
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terramque complectenti, argillæ grauitatem </
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