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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          <note position="right" xml:space="preserve">
            <lb/>
          Maji. # 21. # primæ 50 # 2 # 41
            <lb/>
          # # ultimæ 50 # 2 # 28
            <lb/>
          # 23. # primæ 50 # 2 # 40
            <lb/>
          # # ultimæ 50 # 2 # 27
            <lb/>
          </note>
          <note position="right" xml:space="preserve">
            <lb/>
          # 25. # primæ 50 # 2 # 41
            <lb/>
          # # ultimæ 50 # 2 # 30
            <lb/>
          # 27. # primæ 50 # 2 # 41
            <lb/>
          # # ultimæ 50 # 2 # 28
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          </note>
          <p>
            <s xml:id="echoid-s4609" xml:space="preserve">Intuiti prima fronte hæc Experimenta ſuſpicaremur Aëris rarita-
              <lb/>
            tem majorem minoremve variis diebus, plus minuſve reſiſtere oſcil-
              <lb/>
            lanti Acui, & </s>
            <s xml:id="echoid-s4610" xml:space="preserve">ideo eam varia velocitate arcus ſuos abſolvere, ve-
              <lb/>
            rum tanta raritatis, & </s>
            <s xml:id="echoid-s4611" xml:space="preserve">proinde reſiſtentiæ, differentia in aëre non
              <lb/>
            obtinet horæ intervallo, ut inde in oſcillationibus adeo notabilis
              <lb/>
            diverſitas oriatur, quæ obtinuit in Experimentis tertio Aprilis & </s>
            <s xml:id="echoid-s4612" xml:space="preserve">
              <lb/>
            Vigeſimo Maji captis: </s>
            <s xml:id="echoid-s4613" xml:space="preserve">An inde non ſequitur vim Magnetis omni
              <lb/>
            fere temporis minuto eſſe diverſam, nunc majorem, ſequenti mo-
              <lb/>
            mento autem minorem abſque ordine ullo? </s>
            <s xml:id="echoid-s4614" xml:space="preserve">Hoc colligo ulterius ex
              <lb/>
            aliis Experimentis, quum enim Acus primas oſcillationes 50 abſol-
              <lb/>
            vit intra determinatum tempus, & </s>
            <s xml:id="echoid-s4615" xml:space="preserve">ſecundas 50 etiam intra aliud,
              <lb/>
            ſed determinatum tempus; </s>
            <s xml:id="echoid-s4616" xml:space="preserve">an non deberet ſemper ultimas 50 vi-
              <lb/>
            brationes deſcribere intra idem tempus, deſcriptis 50 primis in tem-
              <lb/>
            poribus æqualibus, & </s>
            <s xml:id="echoid-s4617" xml:space="preserve">poſita vi Magnetica aliquamdiu conſtanti,
              <lb/>
            verum ea perpetuo variante etiam ultimæ 50 vibrationes brevius
              <lb/>
            longiuſve tempus poſtulabunt: </s>
            <s xml:id="echoid-s4618" xml:space="preserve">Ecce Vigeſimo Maji in duobus ul-
              <lb/>
            timis tentaminibus, primæ 50 Vibrationes peractæ ſunt 2?</s>
            <s xml:id="echoid-s4619" xml:space="preserve">, 38?</s>
            <s xml:id="echoid-s4620" xml:space="preserve">. ſed
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            ultimæ 50 in medio tentamine abſolvebantur 2?</s>
            <s xml:id="echoid-s4621" xml:space="preserve">, 2?</s>
            <s xml:id="echoid-s4622" xml:space="preserve">, & </s>
            <s xml:id="echoid-s4623" xml:space="preserve">ultimæ 50
              <lb/>
            in poſtremo tentamine peragebantur 2?</s>
            <s xml:id="echoid-s4624" xml:space="preserve">, 20?</s>
            <s xml:id="echoid-s4625" xml:space="preserve">. Ita comparemus ten-
              <lb/>
            tamina inſtituta Maji 21 & </s>
            <s xml:id="echoid-s4626" xml:space="preserve">25. </s>
            <s xml:id="echoid-s4627" xml:space="preserve">ubi primæ 50 Vibrationes abſolu-
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            tæ ſunt 2?</s>
            <s xml:id="echoid-s4628" xml:space="preserve">, 41?</s>
            <s xml:id="echoid-s4629" xml:space="preserve">. ſed 50 ultimæ in primo tentamine 2?</s>
            <s xml:id="echoid-s4630" xml:space="preserve">, 48?</s>
            <s xml:id="echoid-s4631" xml:space="preserve">. & </s>
            <s xml:id="echoid-s4632" xml:space="preserve">50
              <lb/>
            ultimæ in poſtremo tentamine 2?</s>
            <s xml:id="echoid-s4633" xml:space="preserve">, 30?</s>
            <s xml:id="echoid-s4634" xml:space="preserve">. In hac ſententia me conſir-
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            maverunt plurima alia Experimenta cum Magnete capta; </s>
            <s xml:id="echoid-s4635" xml:space="preserve">Magnetis
              <lb/>
            Declinatio ope longæ Acus explorata, perpetuo mutatur, veluti
              <lb/>
            ſupra in Exp. </s>
            <s xml:id="echoid-s4636" xml:space="preserve">XC. </s>
            <s xml:id="echoid-s4637" xml:space="preserve">oſtendimus: </s>
            <s xml:id="echoid-s4638" xml:space="preserve">Inclinatio Acus fere nunquam
              <lb/>
            eſt eadem, licet uno die 10 tentamina inſtituantur; </s>
            <s xml:id="echoid-s4639" xml:space="preserve">quæ modo me-
              <lb/>
            moratis addita obſervationibus, luce Meridiana clarius evincunt,
              <lb/>
            perpetuis mutationibus vim Magneticam eſſe obnoxiam, ſive di-
              <lb/>
            rectionem, ſive virium magnitudinem ſpectemus. </s>
            <s xml:id="echoid-s4640" xml:space="preserve">Hoc forſitan </s>
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