Descartes, René, Renati Des-Cartes principia philosophiae

Table of figures

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              in Auſtralibus, perpendiculariter ſtante, illumque hoc
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              pacto cymbae impoſitum, quandam aequatoris ſui par­
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              tem ſemper accuratè eandem verſus Boream, & oppo­
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              ſitam verſus Auſtrum convertere. </s>
              <s>Quod an verum ſit
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              nullo mihi adhuc experimento compertum eſt. </s>
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              facilè mihi perſuadeo non omnino eandem, nec fortè
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              etiam tantam eſſe declinationem, in magnete ita con­
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              ſtituto, quàm in eo cujus poli aequaliter à Terrâ diſtant. </s>
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              Nam particulae ſtriatae, in hac ſuperiore Terrae regione,
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              non modò per lineas aequaliter ab ejus centro
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              ab uno polo ad alium revertuntur, ſed etiam ubique
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              (praeterquam ſub aequatore) nonnullae ab interioribus
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              ejus partibus aſcendunt: & magnetis ſupra polos
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              erecti converſio ab his ultimis, declinatio verò à prio­
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              ribus praecipuè
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              5</s>
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              10</s>
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              15</s>
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              <s>Praeterea magnes trahit ferrum, ſive potiùs magnes
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              &sferrum ad invicem accedunt; neque enim ulla ibi
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              tractio eſt, ſed ſtatim atque ferrum eſt intra ſphaeram
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              activitatis magnetis, vim ab eo mutuatur, & particu­
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              lae ſtriatae, ab utroque egredientes, ae*rem</s>
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              interme­
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              dium expellunt: quo fit, ut ambo ad invicem non aliter
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              quàm duo magnetes accedant. </s>
              <s>Imò etiam ferrum libe­
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              riùs movetur quàm magnes, quia conſtat iis tantùm
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              ramentis, in quibus particulae ſtriatae ſuos habent mea­
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              tus, magnes autem multâ materiâ lapideâ
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              </s>
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              20</s>
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              25</s>
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              <s>Sed multi mirantur magnetem armatum, ſive lami­
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              nam ferream magneti adjunctam, plus ferri poſſe
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              ſuſtinere, quàm ſolum magnetem. </s>
              <s>Cujus tamen ratio </s>
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