Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670

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            uent, ny toutes les differentes rencon-
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            tres qui modifient, & </s>
            <s xml:id="echoid-s1871" xml:space="preserve">qui empeſchent,
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            ou aydent leurs effects, neantmoins il
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            eſt ayſé de remarquer tous les pheno-
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            menes , qui nous paroiſſent dans les
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            corps differens, comme iefais icy dans
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            la pierre d’Aymant, qui peut eſtre con-
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            ſiderée à l’égard du Ciel, vers lequel
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            elle ſe tourne, ou du fer qu’elle attire.
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            </s>
            <s xml:id="echoid-s1872" xml:space="preserve">Quant à l’égard du Ciel, toutes ſes par-
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            ti
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            es en regardent vn certain point, ce
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            qui dépend de ſa conuerſion vers le po-
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            le Arctique , car lors qu’on fait nager
              <lb/>
            cette pierre ſur l’eau par le moyen du
              <lb/>
            li
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            ege, ou en quelqu’autre maniere, elle
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            tourne l’vn de ſes coſtez vers le Septen-
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            trion : </s>
            <s xml:id="echoid-s1873" xml:space="preserve">mais il eſt difficile de ſçauoir ſi ce
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            coſté de la pierre eſt Meridional , ou
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            Septentrional, d’autant qu’il faut frot-
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            ter le bout des aiguilles du coſté qu’el-
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            le tourne vers le Mi
              <unsure/>
            dy , pour les faire
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            tourner vers le Septentrion, car f’il eſt
              <lb/>
            frotté du coſté de la pierre , qui va vers
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            le Septĕ
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            trion, il ira vers le Midy. </s>
            <s xml:id="echoid-s1874" xml:space="preserve">Mais
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            elle ne tourne pas touſiours l’vn de ces
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            coſtez iuſtement vers le Pole, car elle
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            decline tantoſt vers l Orient
              <unsure/>
            , & </s>
            <s xml:id="echoid-s1875" xml:space="preserve">d’au-
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            tresfois vers l’Occi
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            dent, ſelon qu’il y </s>
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