Descartes, René
,
Renati Des-Cartes principia philosophiae
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exemplum in reliquis ibi poli eſſe cenſentur, ubi
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maxima vis apparet. </
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polo quàm in alio, niſi quatenus particulae ſtriatae, per
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unum ingreſſae, per aliùm egrediuntar: atqui nulla
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eſt tantilla pars magnetis, in quâ, ſi habent ingreſſum,
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non habeant etiam egreſſum. </
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CLVII.
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Cur eadem ſit vis in
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quâvis magnetis
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parte, ac in toto c. </
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Nec mirum eſt, quòd ferrum, magneti admotum,
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vim magneticam ab illo acquirat. </
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meatus recipiendis particulis ſtriatis idoneos, nihilque
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ipſi deeſt ad iſtam vim acquirendam, niſi
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exi
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guae quaedam ramulorum, ex quibus ejus ramenta
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conſtant, extremitates hinc inde in iſtis' meatibus pro
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mineant; quae omnes verſus unam & eandem partem
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flecti debent, in iis meatibus per quos tranſire poſ
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ſunt particulae ſtriatee ab Auſtro venientes, &
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oppoſitam in aliis. </
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lae ſtriatae, magnâ vi & magnâ copiâ, torrentis inſtar,
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in ferri meatus irruentes, iſtas ramulorum extremita
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tes hoc pacto inflect; ac proinde ipſi dant id omne,
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quòd in eo ad vim magneticam deſiderabatur.
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CLVIII.
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Cur magnes ſuam vim
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ferro ſibi admoto
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communicet a. </
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Et quidem pro variis partibus magnetis, ad quas
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ferrum applicatur, variè ac
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cipit iſtam vim. </
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ferri RST, ſi applicetur polo
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Boreali magnetis P,
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po
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lus Auſtralis ferri, quia per
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illam ingredientur particulae
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ſtriatae ab Auſtro venientes,
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&sper partem T ingredientur Boreales, ex polo A </
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