Borro, Girolamo
,
De motu gravium et levium
,
1575
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31
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011/01/051.jpg
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tantum relatione quadam, quod cælum rotundum ſit, & in
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abſoluti orbis ſpeciem ita efformatum, vt nihil inueniri possit
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aut rotundius, aut æque rotundum, & propterea nullam con
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trariam partium poſitionem habeat: ideo hæc locorum inter
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ualla, & haſce locorum rationes ſat non eſſe cenſuit, ad gra
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uium, & leuium definitiones constituendas; idipſum Platoni
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adſcripſit Alcinous in libro, cui titulus eſt de dogmate Plato
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nis capite vigeſimo: leuia ergo Plato affirmauit, quæ (vt ipſe
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loquitur) ex paucioribus triangulis
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cõponuntur
">componuntur</
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; grauia, quæ
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quaſi pluribus ex triangulis fiunt, perinde ac ſi per partes
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eiuſdem generis, triangulos intelligat, nullum enim corpus,
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apud Platonem in Timæo inuenitur, quin illud ex figuris
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concretum ſit. </
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<
s
id
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s.000310
">Hinc Plato ſequi putat prima corpora ex pri
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mis figuris eſſe concreta, ſed prima omnium figurarum est
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circularis, quæ rotundo cælo, quod ad volubilitatem rotun
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datum est, à natura tribuitur; de quo nobis est alio loco di
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ſputatum. </
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<
s
id
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s.000311
">Secunda figura est plana; & inter planas, pri
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ma est triangula, quæ primis illis corporibus adſcribitur; quæ
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recto motu cientur: nec omnes trianguli ſunt eodem loco
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habendi, cum illi ſint natura priores, qui rectum angu
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lum habent, vt ſunt lſoſcheles, & Scalenus; at rectus
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angulus natura præcedit acutum, atque obtuſum: rectus
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etiam vnius naturam optimè redolet, cum nulla ratione va
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riari queat: acutus autem, & obtuſus multis modis va
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rientur; propter has omnes cauſas lſoſchelem, & Scale
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num Plato elegit, vt ex illis, quas planas primas figu
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ras cenſuit, prima elementorum corpora componeret, mo
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do Platonis, & non Timæi Pythagorici ſit illa ſententia,
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quæ in Timæo ſcribitur, & ex libro de vniuerſitate Ti
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mæi ad verbum transfertur: cuiuſcumque tamen ſit: feren-
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