Casati, Paolo
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Terra machinis mota : dissertationes geometricae, mechanicae physicae hydrostaticae
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Amice Lector.
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>MACHINALIS & Hydroſtaticæ Philoſophiæ,
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quam premo, ſpecimen aliquod exhibi
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turus, ac Prodromum tantiſper emiſſu
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rus dum extrema manus operi accedat,
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Archimedæum Problema ſelegi, quo tel
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lurem moueri poſſe proſitebatur, niſi locus, vbi machi
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na conſiſteret, defuiſſet. </
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>Qua ille machinatione id per
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ficere moliretur, Hiſtoricis diſputandum relinquo. </
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>Mul
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tiplex ſuppetebat methodus; ſatis ſcio. </
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>Placuit tamen
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potiſſimùm oſtendere, quantum in hoc negotio machi
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narum Compoſitio præſtet earundem Augmento: id
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que intrà eiuſdem Facultatis genus; vt vel ſolos Vectes
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adhibendo, vel ſolas Trochleas &c. </
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>quod verò in vno
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genere explicatur, de cæteris dictum facilè intelligitur. </
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Ne quis autem in motu iſto perficiendo aut immenſas,
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aut innumeras requiri machinas exiſtimaret, tentaui to
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tius globi terraquei grauitatem, quantum coniiciendo
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aſſequi fas eſt, explorare: vnde apertâ conſecutione con
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ſicitur non adeò multis membris diſtingui oportere ma
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chinam hoc in opere neceſſariam: vtinam de materię
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ipsâ non ſatis firmâ dubitari non poſſet. </
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<
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>Quoniam ve
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rò grauitatis notitia pendet ex mole præcognitâ; vt ab
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ſolutum eſſet Problema, methodos indicaui, quibus
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terræ magnitudinem indagare poſsimus: vt videlicet ex
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notâ mole pondus innoteſcat, & hinc definiri poſſit ma
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china quæ datæ grauitati mouendæ proportione reſpon
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deat. </
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>Sed quia in motu ipſo aqua in partem ſecederet,
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motumque faciliorem efficeret; examinandum fuit, </
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