Descartes, René
,
Renati Des-Cartes principia philosophiae
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cauſà, quae venit ex K verſus
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e
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, quae autem ex L verſus
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g
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: hinc fiet ut poli
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ſd
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, circa quos tota Solis materia
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vertetur, non ſint in lineis rectis à K & L ad S ductis,
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ſed Auſtralis
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ſ
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aliquantò magis verſus
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e
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accedat, &
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Borealis
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d
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verſus
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g
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. </
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<
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>Item, ſi linea recta SM, per quam
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materia primi elementi facillimè egreditur ab S ver
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ſus C, tranſeat per punctum circumferentiae ſed, vici
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nius puncto d quàm puncto
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ſ
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; ac linea SY, per quam
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iſta materia praecipuè tendit ab S verſus O, tranſeat
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per punctum circumferentim
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ſgd
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, vicinius puncto
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ſ
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quàm puncto
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d
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: hinc ſiet ut
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eg
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Solis ecliptica, ſive pla
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num in quo movetur illa ejus materia, quae maximum
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circulum deſcribit, paulò magis inclinetur à parte e
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verſus polum
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d
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, quàm verſus polum
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ſ
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, ſed tamen non
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tantum quàm linea recta SM a; atque ex parte
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g
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magis
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inclinetur verſus
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ſ
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quàm verſus
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d
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, ſed etiam non tan
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tum quàm recta SY. </
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<
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>Unde ſequetur axem, circa quem
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tota Solis materia vertitur, & cujus extremitates ſunt
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poli
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ſd
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, non eſſe lineam accuratè rectam, ſed nonnihil
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curvam ſive inflexam; materiamque iſtam aliquantò
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celeriùs gyrare inter
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e & d
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, vel inter
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ſ
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&
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g
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, quàm inter
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e
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&
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ſ
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, vel
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d
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&
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g
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; ac fortè etiam, non omnino aequali
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celeritate gyrare inter
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e
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&
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d
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, atque inter
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ſ
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&
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g
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. </
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LXXIV.
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Varias etiam eſſe in
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ejus materiae motu. </
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5</
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10</
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15</
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20</
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LXXV.
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Eas tamen non impe
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dire ne ejus figura ſit
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rotunda.
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Quod tamen non poteſt impedire, ne ipſius corpus
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ſit quam-proxim rotundum: quia interim alius ejus
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motus, à polis verſus eclipticam, inaequalitates iſtas
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compenſat. </
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<
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>Eâdemque ratione, quà videmus ampul
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lam vitream ex eo ſolo fieri rotundam, quòd aer
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in
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ejus materiam igne liquefactam per tubum ferreum
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immittatur; quia nempe iſte aer
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non majori vi ab </
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