Descartes, René
,
Renati Des-Cartes principia philosophiae
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etiam ad eoſdem interea modis aliis quamplurimis
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agendos. </
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coeperint, pergunt poſtea quantum poſſunt, ſecundùm
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lineas rectas, vel à rectis quam-minimùm deflectentes:
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hinc ſit ut hi globuli coeleſtes, particulis tertii elementi,
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corpora omnia tertiae Terrae regionis componentibus,
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immifti, varios in iis effectus producant, quorum tres
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praecipuos hîc notabo. </
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XV.
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De actionibus, quarum
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ope iſta corpora ge
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nita ſunt; ac primò
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de generali globulo
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rum coeleſstium motu. </
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Primus eſt, quòd pellucida reddant ea omnia cor
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pora terreſtria quae liquida ſunt, & conſtant particulis
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tertii elementi tam tenuibus, ut globuli iſti circa ipſas
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in omnes partes ferantur. </
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>Cùm enim per iſtorum
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corporum meatus hinc inde aſſidù moveantur, vimque
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habeant eorum particulas ſitu mutandi, facilè ſibi vias
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rectas, ſive rectis aequipollentes, & proinde transferen
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dae actioni luminis idoneas, in illis efformant. </
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omnino experimur, nullum eſſe in Terrâ liquorem pu
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rum, & tenuibus particulis conſtantem, qui non ſit pel
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lucidus. </
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ſunt ejus particulae, quàm ut globulos ſecundi elementi
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ubique circa ſe admittant; quantum verò ad atramen
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tum, lac, ſanguinem, & talia, non ſunt liquores puri,
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ſed plurimis pulviſculis durorum corporum inſperſi. </
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quantum ad corpora dura, obſervari poteſt ea omnia
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eſſe pellucida, quae dum formabantur & adhuc liquida
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erant, pellucida fuerunt, quorumque partes retinent
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eundem ſitum, in quo poſitze ſunt à globulis materiae
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coeleſtis, dum circa ipſas nondum ſibi mutuò adhaerentes
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movebantur. </
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rum particulae ſimul junctae & connexae ſunt à vi aliquâ
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externâ, motui globulorum coeleſtium ipſis immiſtorum </
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