Descartes, René, Renati Des-Cartes principia philosophiae
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              ritur ex unâ parte atque ex alterâ. </s>
              <s>Quapropter ſi
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              omnino propriam, & non ad aliud relatam, naturam
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              motui tribuere vellemus, cùm duo corpora contigua
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              unum in unam, aliud in aliam partem transferuntur,
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              ſicque à ſe mutuò ſeparantur, tantundem motûs
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              uno quàm in altero eſſe diceremus. </s>
              <s>Sed hoc à com­
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              muni loquendi uſu nimium abhorreret: cúm enim
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              aſſueti ſimus ſtare in terrâ, eamque ut quieſcentem
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              conſiderare, quamvis aliquas ejus partes, aliis mino­
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              ribus corporibus contiguas, ab eorum
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              tranſ­
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              ferri videamus, non tamen ipſam ideò moveri pu­
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              tamus. </s>
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              XXIX.
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              Nec referri niſi ad ea
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              corpora contigua,
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              quae tanquam quie­
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              ſcientie ſpectantur. </s>
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              25</s>
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              5</s>
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              10</s>
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              Hujuſque rei praecipua ratio eſt, quòd motus intel­
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              ligatur eſſe totius corporis quod movetur, nec poſſit
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              ita intelligi eſſe totius terrae, ob
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              quarun­
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              dam ejus partium ex viciniâ minorum corporum qui­
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              bus contiguae ſunt: quoniam ſaepe plures ejuſmodi
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              tranſlationes ſibi mutuò contrarias, in ipſà licet ad­
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              vertere. </s>
              <s>Ut ſi corpus E ſ GH ſit
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              terra, & ſupra ipſam
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              tem­
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              pore corpus A B transferatur ab E
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              verſus F, ac CD ab H verſus G,
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              quamvis hoc ipſo partes terrae
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              corpori AB contiguae à B verſus A
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              transferantur, neque minor
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              alterius natura a actio in iis eſſe debeat, ad illam
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              tranſlationem, quàm in corpore AB: non ide intel­
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              ligimus terram moveri à B verſus A, ſive ab Occi­
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              dente verſus Orientem, quia pari ratione ob id quòd
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              ejus partes corpori CD contiguae transferantur à
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              verſus D, intelligendum eſſet eam etiam in aliam </s>
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