Musschenbroek, Petrus van, Physicae experimentales, et geometricae de magnete, tuborum capillarium vitreorumque speculorum attractione, magnitudine terrae, cohaerentia corporum firmorum dissertationes: ut et ephemerides meteorologicae ultraiectinae

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            <s xml:id="echoid-s2659" xml:space="preserve">
              <pb o="109" file="0123" n="123" rhead="DE MAGNETE."/>
            ipſum tranſire Ferrum, & </s>
            <s xml:id="echoid-s2660" xml:space="preserve">ita ad inſignem diſtantiam extendi: </s>
            <s xml:id="echoid-s2661" xml:space="preserve">mira-
              <lb/>
            mur hic tamen Clavim B K non tantopere trahi a Magnete A, quam
              <lb/>
            a clave C, huic enim adhæret, non Magneti; </s>
            <s xml:id="echoid-s2662" xml:space="preserve">attamen Magnes eſt
              <lb/>
            cauſa attractionis, ſolvuntur enim illico a ſe claves, ſimulac altius
              <lb/>
            ſupra Magnetem elevantur: </s>
            <s xml:id="echoid-s2663" xml:space="preserve">Cur itaque clavis C adeo remota â Ma-
              <lb/>
            gnete, fortius trahit clavim B, quam Magnes A eam trahit? </s>
            <s xml:id="echoid-s2664" xml:space="preserve">forſi-
              <lb/>
            tan aliquis opinaretur clavim B non trahi a Magnete, ſed repelli
              <lb/>
            contra C, quod verum non eſt; </s>
            <s xml:id="echoid-s2665" xml:space="preserve">nam trahitur B fortiſſime a Ma-
              <lb/>
            gnete; </s>
            <s xml:id="echoid-s2666" xml:space="preserve">hoc pater, ſi polus Magnetis fuerit in E, & </s>
            <s xml:id="echoid-s2667" xml:space="preserve">clavis B circa
              <lb/>
            eum circulariter, ſed ad notabilem diſtantiam, in latioris ſcilicet
              <lb/>
            circuli peripheriâ, circumferatur, pars K inferior verſus E trahetur,
              <lb/>
            totaque clavis ſitum acquiret valde obliquum, & </s>
            <s xml:id="echoid-s2668" xml:space="preserve">circumducta ſu-
              <lb/>
            perficiem conicam deſcribere videbitur: </s>
            <s xml:id="echoid-s2669" xml:space="preserve">in inſtituendo hoc Expe-
              <lb/>
            rimento præterea obſervatur, axe Magnetis perpendiculari ad ho-
              <lb/>
            rizontem poſito, claves altius ſupra Magnetem attolli poſſe ſalvâ at-
              <lb/>
            tractione, quam axe horizonti parallelo: </s>
            <s xml:id="echoid-s2670" xml:space="preserve">& </s>
            <s xml:id="echoid-s2671" xml:space="preserve">ſi polus Boreus Ma-
              <lb/>
            gnetis ſurſum ſpectaverit, tum omnium altiſſime & </s>
            <s xml:id="echoid-s2672" xml:space="preserve">in maximo a
              <lb/>
            lapide intervallo claves attolli poterunt ſuperſtite cohærentia mu-
              <lb/>
            tua.</s>
            <s xml:id="echoid-s2673" xml:space="preserve"/>
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        <div xml:id="echoid-div66" type="section" level="1" n="66">
          <head xml:id="echoid-head74" xml:space="preserve">EXPERIMENTUM XLVI.</head>
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            <s xml:id="echoid-s2674" xml:space="preserve">Tab. </s>
            <s xml:id="echoid-s2675" xml:space="preserve">2. </s>
            <s xml:id="echoid-s2676" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s2677" xml:space="preserve">5. </s>
            <s xml:id="echoid-s2678" xml:space="preserve">Aliquot parvi globi ferrei, C, D, E, ſibi applicati,
              <lb/>
            & </s>
            <s xml:id="echoid-s2679" xml:space="preserve">ex ſeſuſpenſi attrahantur ſerie rectâ ad horizontem perpendiculari
              <lb/>
            a polo A Magnetis P A, deinde polus cognominis A, alterius Ma-
              <lb/>
            gnetis B lente admoveatur globo infimo E, a quo notabili adhuc
              <lb/>
            remotus intervallo, ſeparabit globum E â D, totamque globorum
              <lb/>
            ſeriem D C fugabit, obliquum ei ſitum dando.</s>
            <s xml:id="echoid-s2680" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2681" xml:space="preserve">Eſt perpetuæ obſervationis polos cognomines duorum Magnetum
              <lb/>
            ſe invicem fugare; </s>
            <s xml:id="echoid-s2682" xml:space="preserve">hoc poſito, polus A Magnetis A P ad ſe trahit
              <lb/>
            globorum ſeriem E D C, directione ab E ad C, adeoque
              <lb/>
            omnes globorum infimæ partes erunt poli cognomines ipſius A,
              <lb/>
            & </s>
            <s xml:id="echoid-s2683" xml:space="preserve">ſupremæ partes erunt cognomines poli P. </s>
            <s xml:id="echoid-s2684" xml:space="preserve">poſito igitur Magne-
              <lb/>
            tis B S polo B cognomine ipſius A, hoc eſt infimarum partium glo-
              <lb/>
            borum, debebunt hæ omnes a polo B fugari, ſi vis fugans ipſius
              <lb/>
            B, ſit major vi trahente poli A in globum remotiſſimum E, in quem
              <lb/>
            parum tantummodo operari poteſt, globus E fugatus nimium a </s>
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