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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          <pb o="158" file="0172" n="172" rhead="DISSERTATIO"/>
          <p>
            <s xml:id="echoid-s3958" xml:space="preserve">Colligimus ex his Experimentis Declinationem Acus variare fere
              <lb/>
            qualibet hora, imo forte quolibet Minuto, uti nonnullæ obſerva-
              <lb/>
            tiones demonſtrant.</s>
            <s xml:id="echoid-s3959" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3960" xml:space="preserve">2°. </s>
            <s xml:id="echoid-s3961" xml:space="preserve">Duas Acus, eidem Magneti affrictas, habere diverſam Declina-
              <lb/>
            tionem, unâ declinante in Cupro 14°. </s>
            <s xml:id="echoid-s3962" xml:space="preserve">30`. </s>
            <s xml:id="echoid-s3963" xml:space="preserve">alterâ in capſulâ li-
              <lb/>
            gnea 14°. </s>
            <s xml:id="echoid-s3964" xml:space="preserve">25`.</s>
            <s xml:id="echoid-s3965" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3966" xml:space="preserve">3°. </s>
            <s xml:id="echoid-s3967" xml:space="preserve">Patet quodDeclinatio major & </s>
            <s xml:id="echoid-s3968" xml:space="preserve">minor mutabatur in utraque Acu
              <lb/>
            ſimul, ſed non æqualiter, nunc enim fiebat in hoc Acu major, nuncin
              <lb/>
            alterâ: </s>
            <s xml:id="echoid-s3969" xml:space="preserve">ambæ primæ obſervationes cum Acu in cuprea capſula pro-
              <lb/>
            bant variationem = 10 M`. </s>
            <s xml:id="echoid-s3970" xml:space="preserve">cum in ligno variatio nis differentia erat
              <lb/>
            æqualis 5 M`. </s>
            <s xml:id="echoid-s3971" xml:space="preserve">Sed tertia variatio in Cupro differt a ſecunda modo 5 M`.
              <lb/>
            </s>
            <s xml:id="echoid-s3972" xml:space="preserve">tertia vero in Ligno differt a ſecunda 10 M?</s>
            <s xml:id="echoid-s3973" xml:space="preserve">.</s>
          </p>
          <p>
            <s xml:id="echoid-s3974" xml:space="preserve">4°. </s>
            <s xml:id="echoid-s3975" xml:space="preserve">Sed intra ſpatium 3 hor. </s>
            <s xml:id="echoid-s3976" xml:space="preserve">8`. </s>
            <s xml:id="echoid-s3977" xml:space="preserve">variatio fuit in utraque acu =
              <lb/>
            30 M.</s>
            <s xml:id="echoid-s3978" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3979" xml:space="preserve">Utinam obſervator ſimul attendiſſet ad ventos, eorumque muta-
              <lb/>
            tiones! forte enim inde aliquid detegere potuiſſet.</s>
            <s xml:id="echoid-s3980" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s3981" xml:space="preserve">Sed annectere lubet alias obſervationes dierum ſequentium, ut
              <lb/>
            ex iis conſtet, ſemper, & </s>
            <s xml:id="echoid-s3982" xml:space="preserve">quotidie eas Acûs mutationes contingere,
              <lb/>
            imo & </s>
            <s xml:id="echoid-s3983" xml:space="preserve">qualibet hora.</s>
            <s xml:id="echoid-s3984" xml:space="preserve"/>
          </p>
          <note position="right" xml:space="preserve">
            <lb/>
          Declin. # Grad. # M. # Hora. # M.
            <lb/>
          Martii \\ 9 # 14 # 10 # 9 # 30
            <lb/>
          # 14 # 10 + # 10 # 0
            <lb/>
          # 14 # 10 # 10 # 15
            <lb/>
          # 14 # 10 + # 10 # 30
            <lb/>
          # 14 # 15 # 11 # 0
            <lb/>
          # 14 # 0 # 8 # 15
            <lb/>
          # 14 # 0 # 11 # 50
            <lb/>
          Martii \\ 10. # 14 # 10 + # 10 # 0
            <lb/>
          # 14 # 15 # 11 # 0
            <lb/>
          # 14 # 15 # 12 # 0
            <lb/>
          # 14 # 15 + # 12 # 45
            <lb/>
          # 14 # 15 + # 2 # 0
            <lb/>
          # 14 # 15 # 3 # 30
            <lb/>
          # 14 # 15 + # 4 # 0
            <lb/>
          # 14 # 15-- # 5 # 30
            <lb/>
          # 14 # 10 # 6 # 0
            <lb/>
          # 14 # 0 # 6 # 15
            <lb/>
          # 14 # --- # 6 # 30
            <lb/>
          </note>
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