Descartes, René, Renati Des-Cartes principia philosophiae

Table of figures

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              contineatur; etſi fortè aliquando iſtud ferrum aliqui­
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              bus aliis corporibus tam arctè adhaereat, ut faciliùs
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              igne corrumpi, quàm ab iis educi poſſit. </s>
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              CXXXIX.
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              Quae ſit natura
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              magnetis. </s>
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              20</s>
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              25</s>
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              30</s>
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              Cùm autem ferri glebae igni admotae liquefiunt, ut
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              in ferrum aut chalybem vertantur, earum ramenta
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              caloris agitata, & ab heterogeneis corporibus disjun­
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              cta, hinc inde ſe contorquent, donec applicent ſe una
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              aliis, ſecundùm eas ſuperficies, in quibus dimidiatos
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              meatus, recipiendis particulis ſtriatis idoneos, inſ­
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              culptos eſſe paullò antè dictum eſt; ac etiam
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              iſtorum meatuum medietates tam aptè congruant, ut
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              integros meatus efforment. </s>
              <s>Quòd ubi accidit, ſtatim
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              particulae ſtriatae, quae non minùs in igne quàm in
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              aliis corporibus reperiuntur, per illos liberiùs quàm
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              per alia loca fluentes, impediunt ne
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              ſuper­
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              ficies, ex quarum apto ſitu & conjunctione exſur­
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              gunt, tam facilè quàm priùs ſitum mutent; & ipſarum
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              contiguitas, vel ſaltem vis gravitatis, quae ramenta
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              omnia deorſum premit, impedit ne facilè disjun­
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              gantur. Cùmque interim ramenta ipſa
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              agita­
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              tionem ignis pergant moveri, multa ſimul in eundem
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              motum conſpirant, & totus liquor ex iis conſtatus in
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              varias quaſi guttulas aut grumulos diſtinguitur: ita
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              ſcilicet, ut omnia illa ramenta quae ſimul moventur,
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              unam quaſi guttam confaciant, quae gutta
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              ſuper­
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              ficiem motu ſuo ſtatim laevigat & perpolit. </s>
              <s>Occurſu
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              enim aliarum guttarum, quidquid eſt rude atque an­
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              guloſum in ramentis, ex quibus conſtat, ab ejus ſu­
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              perficie ad partes interiores detruditur, atque ita
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              omnes cujuſque guttulae partes quam-arctiſſimè
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              junguntur. </s>
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