Descartes, René, Renati Des-Cartes principia philosophiae

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              humani corporis tangi poſſit, quin hoc ipſo movean­
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              tur aliquot nervorum extremitates per ipſam ſparſae,
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              atque earum motus ad alias eorum nervorum extremi­
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              tates, in cerebro circa ſedem animae collectas, tranſ­
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              feratur, ut in Dioptricae capite quartoa ſatis
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              expli­
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              cui. </s>
              <s>Motus autem qui ſic in cerebro à nervis excitan­
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              tur, animam ſive mentem intimè cerebro conjunctamb
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              diverſimodè afficiunt, prout ipſi ſunt diverſi. </s>
              <s>Atque hae
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              diverſae mentis affectiones, ſive cogitationes, ex iſtis
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              motibus immediatè conſequentes,
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              perceptio­
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              nes, ſive, ut vulgò loquimur, ſenſus appellantur. </s>
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              25</s>
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              <s>
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              5</s>
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              10</s>
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              <s>Horum ſenſuum diverſitates primò ab ipſorum ner­
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              vorum diverſitate, ac deinde à diverſitate motuum, qui
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              in ſingulis nervis fiunt, dependent. </s>
              <s>Neque tamen ſin­
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              guli nervi faciunt ſingulos ſenſus à reliquis
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              ſed ſeptem tantùm praecipuas differentias in iis notare
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              licet, quarum duae pertinent ad ſenſus internos, aliae
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              quinque ad externos. </s>
              <s>Nempe nervi qui ad ventricu­
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              lum oeſophagum, fauces, aliaſque interiores partes,
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              explendis naturalibus deſideriis
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              protendun­
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              tur, faciunt unum ex ſenſibus internis, qui appetitus
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              naturalis vocatur. </s>
              <s>Nervuli verò qui ad cor & praecor­
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              dia, quamvis perexigui ſint, faciunt alium ſenſum in­
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              ternum, in quo conſiſtunt omnes animi commotiones,
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              ſive pathemata, & affectus, ut laetitiae, triſtitiae,
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              odii, & ſimilium. </s>
              <s>Nam, exempli cauſſâ, ſanguis ritè
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              temperatus, facilè ac plus ſolito in corde ſe dilatans,
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              nervulos circa orificia ſparſos ita laxat & movet, ut
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              inde alius motus in cerebro ſequatur, qui naturali </s>
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