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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          <p>
            <s xml:id="echoid-s5159" xml:space="preserve">Auzutus opinabatur materiam fluere per Terram ad axin pa-
              <lb/>
            rallelo motu, fluxum tamen continuo immutari ab alterationibus,
              <lb/>
            quas arte & </s>
            <s xml:id="echoid-s5160" xml:space="preserve">opera Terræ inducimus, eam excavando hic, alibi
              <lb/>
            accumulando & </s>
            <s xml:id="echoid-s5161" xml:space="preserve">montes & </s>
            <s xml:id="echoid-s5162" xml:space="preserve">acervos; </s>
            <s xml:id="echoid-s5163" xml:space="preserve">idem fieri a naturalibus cor-
              <lb/>
            roſionibus & </s>
            <s xml:id="echoid-s5164" xml:space="preserve">excavationibus, tum a metallorum generatione: </s>
            <s xml:id="echoid-s5165" xml:space="preserve">Verum
              <lb/>
            an tam exiguæ mutationes, quas foſſores Terræ inferunt, pote-
              <lb/>
            runt tantam varietatem, & </s>
            <s xml:id="echoid-s5166" xml:space="preserve">tam conſtantem inducere Declinationi
              <lb/>
            Magnetis? </s>
            <s xml:id="echoid-s5167" xml:space="preserve">Quomodo Magnes ſtationarius explicabitur, qui per
              <lb/>
            4 ſe ſequentes annos a 1720 ad 1725 eadem directione actus
              <lb/>
            fuit? </s>
            <s xml:id="echoid-s5168" xml:space="preserve">An toto hoc tempore foſſores metallorum per univerſum
              <lb/>
            terrarum orbem quieverunt? </s>
            <s xml:id="echoid-s5169" xml:space="preserve">Quomodo retrogradus explicabitur
              <lb/>
            Magnetis motus? </s>
            <s xml:id="echoid-s5170" xml:space="preserve">Hanc idcirco opinionem, in Philoſ. </s>
            <s xml:id="echoid-s5171" xml:space="preserve">Tranſ. </s>
            <s xml:id="echoid-s5172" xml:space="preserve">N°.
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            </s>
            <s xml:id="echoid-s5173" xml:space="preserve">51. </s>
            <s xml:id="echoid-s5174" xml:space="preserve">propoſitam, nemo amplius amplectitur, nec fovet.</s>
            <s xml:id="echoid-s5175" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5176" xml:space="preserve">Sed ne tempus teramus in hypotheſibus enumerandis, ad ex-
              <lb/>
            perimenta redeamus potius, quæ quamdiu ſtabit Phyſicæ honos,
              <lb/>
            eadem permanebunt, & </s>
            <s xml:id="echoid-s5177" xml:space="preserve">firmam baſin ratiocinio ſemper ſtruent,
              <lb/>
            quæcunque inveniatur cauſa directionis, aut quocunque modo
              <lb/>
            comparata fuerit vis Magnetica.</s>
            <s xml:id="echoid-s5178" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div129" type="section" level="1" n="129">
          <head xml:id="echoid-head138" xml:space="preserve">EXPERIMENTUM CIV.</head>
          <p>
            <s xml:id="echoid-s5179" xml:space="preserve">Conati fuerunt nonnulli Philoſophi Inclinationem & </s>
            <s xml:id="echoid-s5180" xml:space="preserve">Declinatio-
              <lb/>
            nem Acuum Magneticarum explicare ex effectibus, quos Magnes
              <lb/>
            in ejuſmodi Acus edit, fingentes ideo Magnetes globoſos, ſive
              <lb/>
            Terrellas, quia Terram Magnetem grandem habuerunt, in qua
              <lb/>
            omnia phænomena modo majora fiunt, quorum exiguas imagines
              <lb/>
            Magnes quoque conſpiciendas præberet: </s>
            <s xml:id="echoid-s5181" xml:space="preserve">globoſo lapidi inſculpſe-
              <lb/>
            runt Æquatorem, inter utrumque polum medium, & </s>
            <s xml:id="echoid-s5182" xml:space="preserve">Meridianos,
              <lb/>
            quales in artificialibus ſpectamus globis; </s>
            <s xml:id="echoid-s5183" xml:space="preserve">Ut Inclinatio Acus intel-
              <lb/>
            ligatur, ſit in Tab. </s>
            <s xml:id="echoid-s5184" xml:space="preserve">5. </s>
            <s xml:id="echoid-s5185" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s5186" xml:space="preserve">7. </s>
            <s xml:id="echoid-s5187" xml:space="preserve">A B C D Magnes Sphæricus, Acus
              <lb/>
            ſit G H, per cujus centrum gravitatis I ducatur recta E K ex cen-
              <lb/>
            tro Magnetis, atque in hanc perpendicularis M N, repræſentans
              <lb/>
            horizontem, quæ ſit parallela Tangenti punctum L, tum menſuretur
              <lb/>
            angulus M I G, qui vocatur Inclinationis, menſuretur diſtantia pun-
              <lb/>
            cti L a polo A, quo facto habetur Inclinatio Acus in determinata di-
              <lb/>
            ſtantia â polo Magnetis: </s>
            <s xml:id="echoid-s5188" xml:space="preserve">hac methodo condiderunt Tabulam appo-
              <lb/>
            ſitam.</s>
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