Descartes, René
,
Renati Des-Cartes principia philosophiae
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[Figure 71]
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[Figure 84]
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[Figure 88]
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[Figure 89]
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[Figure 90]
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runt quàm priús, nec ideò ad centra uſque ſe exten
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derunt, ſed ab iis aequaliter omni ex parte recedentes,
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loca ibi ſphaerica reliquerunt, à materià primi ele
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menti ex omnibus circumjacentibus locis eò affluente,
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replenda.
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LIV.
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Quomodo Sol & Fixae
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formatae ſint. </
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Ea enim eſt lex naturae a, ut corpora omnia quae in
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orbem aguntur, quantum in ſe eſt, à centris ſui motûs
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recedant. </
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>Atque hic illam vim, quà ſic globuli ſecundi
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elementi, nec non etiam materia primi circa centra
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S, F, congregata, recedere conantur* ab iſtis centris,
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quàm potero accuratiſſimè explicabo. </
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>In eâ enim
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ſolâ lucem conſiſtere infrà oſtendetur b; & ab ipſius
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cognitione multa alia dependent. </
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LV.
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Quid ſit lux. </
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Cùm dico globulos ſecundi elementi recedere co
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nari a centris circa quae vertuntur, non putandum
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idcirco me illis aliquam cogitationem affingere, ex
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quâ procedat iſte conatus; ſed tantùm ipſos ita eſſe
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ſitos, & ad motum incitatos, ut revera ſint eb verſùs
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ituri, ſi à nullâ alià cauſa impediantur. </
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LVI.
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Quis conatus ad motum
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in rebus inanimatis
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ſit intelligendus. </
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Quia verò frequenter multae cauſae diverſae
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ſimul in idem corpus, atque unae aliarum effectus
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impediunt, prout ad has vel illas reſpicimus, dicere
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poſſumus ipſum eodem tempore tendere, ſive ire
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conari, versùs diverſas partes. </
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>Ut, exempli cauſa,
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lapis A, in fundâ EA, circa centrum E rotatus,
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quidem ab A verſùs B, ſi omnes cauſae, quae occurrunt
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ad ejus motum determinandum, ſimul ſpectentur, quia
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revera eò verſùs fertur. </
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>Sed ſi reſpiciamus ad ſolam
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vim motùs quae in ipſo eſt, dicemus illum, cum eſt in </
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