Descartes, René, Renati Des-Cartes principia philosophiae

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                <pb pagenum="344"/>
              cilè, modò in ae*rem, modò
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              in glaciem, vertatur
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              232
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              49. </s>
              <s>
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              De fluxu & refluxu maris
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              È
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              50. </s>
              <s>
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              Cur aqua horis 6 1/5 aſcen­
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              dat, & horis 6 1/5 deſcen­
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              dat
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              234
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              51. </s>
              <s>
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              Cur aeſtus maris ſint majo­
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              res, cùm Luna plena eſt
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              vel nova
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              È
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              52. </s>
              <s>
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              Cur in aequinoctiis ſint
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              maximi
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              236
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              53. </s>
              <s>
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              Cur ae*r & aqua ſemper ab
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              Oriente in Occidentem
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              fluant
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              54. </s>
              <s>
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              Cur in eâdem poli altitu­
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              dine, regiones quae mare
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              habent ad Orientem, ſint
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              aliis magis temperatae
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              237
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              55. </s>
              <s>
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              Cur nullus ſit fluxus nec
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              refluxus in lacubus aut ſta­
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              gnis; & cur in variis lito­
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              ribus variis horis fiat
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              È
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              56. </s>
              <s>
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              Quomodo ejus cauſſae par­
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              ticulares, in ſingulis lito­
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              ribus ſint inveſtigandae
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              238
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              57. </s>
              <s>
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              De naturâ terrae interio­
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              ris
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              È
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              58. </s>
              <s>
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              De naturâ argenti vivi
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              239
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              59. </s>
              <s>
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              De inaequalitate caloris in­
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              teriorem terram perva­
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              dentis
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              È
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              60. </s>
              <s>
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              De iſtius caloris actione
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              240
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              61. </s>
              <s>
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              De ſuccis acribus & acidis,
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              ex quibus fiunt atramen­
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              tum ſutorium, alumen &c.
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              241
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              62. </s>
              <s>
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              De materiâ oleagineâ bitu­
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              minis, ſulphuris &c.
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              242
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              63. </s>
              <s>
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              De Chymicorum Princi­
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              piis, & quomodo metalla
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              in fodinas aſcendant
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              È
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              64. </s>
              <s>
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              De Terrâ exteriore, & de
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              origine fontium
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              È
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              65. </s>
              <s>
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              Cur mare non augeatur ex
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              eo, quòd flumina in illud
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              fluant
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              243
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              66. </s>
              <s>
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              Cur fontes non ſint ſalſi,
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              nec mare dulceſcat
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              244
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              67. </s>
              <s>
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              Cur in quibuſdam puteis
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              aqua ſit ſalſa
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              È
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              68. </s>
              <s>
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              Cur etiam ex quibuſdam
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              montibus ſal effodiatur
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              245
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              69. </s>
              <s>
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              De nitro aliiſque ſalibus,
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              à ſale marino diverſis
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              È
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              70. </s>
              <s>
                <lb/>
              De vaporibus, ſpiritibus, &
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              exhalationibus à terrâ inte­
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              riore ad exteriorem aſcen­
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              dentibus
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              È
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              71. </s>
              <s>
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              Quomodo ex variâ eorum
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              miſturâ varia lapidum,
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              aliorumque foſſilium ge­
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              nera oriantur
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              246
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              72. </s>
              <s>
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              Quomodo metalla ex terrâ
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              interiore ad exteriorem
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              perveniant; & quomodo
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              minium fiat
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              È
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              73. </s>
              <s>
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              Cur non in omnibus terrae
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              locis metalla inveniantur
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              247
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              74. </s>
              <s>
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              Cur potiſſimùm invenian­
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              tur in radicibus montium,
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              verſus Meridiem & Orien­
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              tem
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              È
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              75. </s>
              <s>
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              Fodinas omnes eſſe in
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              terrâ exteriore; nec poſſe
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              unquam ad interiorem fo­
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              diendo perveniri
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              È
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              76. </s>
              <s>
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              De ſulphure, bitumine,
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              argillâ, oleo
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              È
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              77. </s>
              <s>
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              Quomodo fiat terrae motus
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              248
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              78. </s>
              <s>
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              Cur ex quibuſdam monti­
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              bus ignis erumpat
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              È
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              79. </s>
              <s>
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              Cur plures concuſſiones
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              fieri ſoleant in terrae motu,
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              ſicque per aliquot horas
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              aut dies interdum duret
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              249
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              80. </s>
              <s>
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              De naturâ ignis, ejuſque
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              ab ae*re diverſitate
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              È
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              81. </s>
              <s>
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              Quomodo primùm excite­
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              tur
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              250
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              82. </s>
              <s>
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              Quomodo conſervetur
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              È
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              83. </s>
              <s>
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              Cur egeat alimento
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              È </s>
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