Descartes, René
,
Renati Des-Cartes principia philosophiae
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cum impetu venientes, per totam exteriorem ſibi vias
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quaerunt, iſtorum ramentorum meatus ita ſitos in
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veniunt, ut, ad motum ſuum ſecundùm lineas rectas
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continuandum, per illa eorum orificia, per quae priùs
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egredi conſueverant, ingredi conentur, ipſas ibi oc
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currere perexiguis iſtis ramulorum extremitatibus,
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quas inter meatuum ſpiras eminere, ac regreſſuris
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particulis ſtriatis aſſurgere, ſuprà dictum eſt a; haſque
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ramulorum extremitates initio quidem illis reſiſtere,
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ſed ab ipſis ſaepe ſaepius impulſas, ſucceſſu temporis
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omnes in contrariam partem flecti, aut etiam nonnul
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las frangi; cùmque poſtea iſti meatus, ramentorum
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quibus inſunt ſitu mutato, alia ſua orificia particu
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lis ſtriatis obvertunt, has rurſus occurrere extremita
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tibus ramulorum in meatibus aſſurgentium, ipſaſque
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paullatim in aliam partem inflectere & quòd ſaepius
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atque diutius hoc iteratur, eò ramulorum iſtorum in
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utramque partem inflexionem faciliorem evadere. </
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CXXXVIII.
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Quomodo iſti meatus
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apti reddantur, ad
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particulas ſtriatas ab
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utrâ vis parte venien
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tes, admittendas. </
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Et quidem ea ramenta, quae ſaepe hoc pacto per ex
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terioris terrae venas aſcendendo, modò in unam, modò
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in aliam partem converſa fuere, ſive ſola ſimul collecta
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ſint, ſive aliorum corporum meatibus impacta, glebam
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ferri componunt. </
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tum retinuerunt, vel cerè, ſi ut ad fodinas perveni
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rent, illum aliquoties mutare coacta ſuerint, ſaltem,
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ibi poſtea, lapidis alteriuſve corporis meatibus firmi
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ter impacta, per multos annos immota remanſerunt,
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faciunt magnetem. </
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>Atque ita vix ulla eſt ferri gleba,
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quae non aliquo modo ad magnetis naturam accedat,
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&snullus omnino eſt magnes, in quo non aliquid ferri </
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