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-s5297" xml:space="preserve">
              <pb o="227" file="0241" n="241" rhead="de MAGNETE."/>
            vit 5 primas oſcillationes intra 20?</s>
            <s xml:id="echoid-s5298" xml:space="preserve">, ſed 10 oſcillationes intra
              <lb/>
            39?</s>
            <s xml:id="echoid-s5299" xml:space="preserve">.</s>
          </p>
          <p>
            <s xml:id="echoid-s5300" xml:space="preserve">4°. </s>
            <s xml:id="echoid-s5301" xml:space="preserve">Acus 6 poll. </s>
            <s xml:id="echoid-s5302" xml:space="preserve">6 linear. </s>
            <s xml:id="echoid-s5303" xml:space="preserve">cujus pondus 57 granorum abſolvit 5
              <lb/>
            vibrationes intra 18?</s>
            <s xml:id="echoid-s5304" xml:space="preserve">. decem vibrationes intra 35?</s>
            <s xml:id="echoid-s5305" xml:space="preserve">. 15 vibrationes
              <lb/>
            intra 52?</s>
            <s xml:id="echoid-s5306" xml:space="preserve">, viginti vibrationes intra 1?</s>
            <s xml:id="echoid-s5307" xml:space="preserve">, 10?</s>
            <s xml:id="echoid-s5308" xml:space="preserve">.</s>
          </p>
          <p>
            <s xml:id="echoid-s5309" xml:space="preserve">5°. </s>
            <s xml:id="echoid-s5310" xml:space="preserve">Acus 6 poll. </s>
            <s xml:id="echoid-s5311" xml:space="preserve">6 linear. </s>
            <s xml:id="echoid-s5312" xml:space="preserve">cujus pondus 56 granorum abſolvit 20
              <lb/>
            vibrationes intra 1?</s>
            <s xml:id="echoid-s5313" xml:space="preserve">, 14?</s>
            <s xml:id="echoid-s5314" xml:space="preserve">. in alio tentamine 10 vibrationes intra
              <lb/>
            40?</s>
            <s xml:id="echoid-s5315" xml:space="preserve">, viginti intra 1?</s>
            <s xml:id="echoid-s5316" xml:space="preserve">, 12?</s>
            <s xml:id="echoid-s5317" xml:space="preserve">. in alio tentamine 20 vibrationes perfecit
              <lb/>
            intra 1?</s>
            <s xml:id="echoid-s5318" xml:space="preserve">, 13?</s>
            <s xml:id="echoid-s5319" xml:space="preserve">. in alio tentamine viginti vibrationes deſcripſit intra
              <lb/>
            1?</s>
            <s xml:id="echoid-s5320" xml:space="preserve">, 16?</s>
            <s xml:id="echoid-s5321" xml:space="preserve">.</s>
          </p>
          <p>
            <s xml:id="echoid-s5322" xml:space="preserve">6°. </s>
            <s xml:id="echoid-s5323" xml:space="preserve">Acus 9 pollices longa, cujus pondus 95 granorum abſolvit
              <lb/>
            10 vibrationes intra 1 Minutum, in alio tentamine in 56?</s>
            <s xml:id="echoid-s5324" xml:space="preserve">.</s>
          </p>
          <p>
            <s xml:id="echoid-s5325" xml:space="preserve">7°. </s>
            <s xml:id="echoid-s5326" xml:space="preserve">Acus 12 pollic. </s>
            <s xml:id="echoid-s5327" xml:space="preserve">10 linear. </s>
            <s xml:id="echoid-s5328" xml:space="preserve">cujus pondus 205 gran. </s>
            <s xml:id="echoid-s5329" xml:space="preserve">abſolvit 5
              <lb/>
            vibrationes intra 54?</s>
            <s xml:id="echoid-s5330" xml:space="preserve">. decem vibrationes intra 1?</s>
            <s xml:id="echoid-s5331" xml:space="preserve">, 46?</s>
            <s xml:id="echoid-s5332" xml:space="preserve">. quindecim
              <lb/>
            vibrationes intra 2?</s>
            <s xml:id="echoid-s5333" xml:space="preserve">, 39?</s>
            <s xml:id="echoid-s5334" xml:space="preserve">. viginti vibrationes intra 3?</s>
            <s xml:id="echoid-s5335" xml:space="preserve">, 30?</s>
            <s xml:id="echoid-s5336" xml:space="preserve">. triginta
              <lb/>
            vibrationes intra 5?</s>
            <s xml:id="echoid-s5337" xml:space="preserve">, 8?</s>
            <s xml:id="echoid-s5338" xml:space="preserve">.</s>
          </p>
          <p>
            <s xml:id="echoid-s5339" xml:space="preserve">8°. </s>
            <s xml:id="echoid-s5340" xml:space="preserve">Acus 5 pollic. </s>
            <s xml:id="echoid-s5341" xml:space="preserve">5 linear. </s>
            <s xml:id="echoid-s5342" xml:space="preserve">ponderis 30 granorum abſolvit 5 vi-
              <lb/>
            brationes in 35?</s>
            <s xml:id="echoid-s5343" xml:space="preserve">. decem in 1?</s>
            <s xml:id="echoid-s5344" xml:space="preserve">, 5?</s>
            <s xml:id="echoid-s5345" xml:space="preserve">. alias decem in 60?</s>
            <s xml:id="echoid-s5346" xml:space="preserve">.</s>
          </p>
          <p>
            <s xml:id="echoid-s5347" xml:space="preserve">Obſervamus in hiſce Experimentis anomalias, illis ſimiles, quas
              <lb/>
            in Acu Inclinatoria notavimus, æque multæ enim vibrationes non
              <lb/>
            abſolvuntur ſemper eodem tempore, ſed diverſo, etiamſi inter
              <lb/>
            tentamina repetita nequidem horæ quadrans interceſſerit, quia vero
              <lb/>
            pendent oſcillationes hæ â vi directrice Magnetica, quemadmodum
              <lb/>
            in Acu Inclinatoria, erit maxima hujus virtutis perpetua inæquali-
              <lb/>
            tas, uti ſupra indicavimus: </s>
            <s xml:id="echoid-s5348" xml:space="preserve">cæteroquin videntur eſſe Quadrata tem-
              <lb/>
            porum, quibus vibrationes duarum Acuum variæ longitudinis ab-
              <lb/>
            ſolvuntur, in ratione compoſita ex directâ longitudinis & </s>
            <s xml:id="echoid-s5349" xml:space="preserve">gravita-
              <lb/>
            tis. </s>
            <s xml:id="echoid-s5350" xml:space="preserve">ſive maſſæ.</s>
            <s xml:id="echoid-s5351" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5352" xml:space="preserve">Nam Acûs 9 pollicum, ſive 108 linearum, pondus fuit 95 gra-
              <lb/>
            norum, hi duo numeri per ſe multiplicati, dant 10260: </s>
            <s xml:id="echoid-s5353" xml:space="preserve">Acus 12 poll.
              <lb/>
            </s>
            <s xml:id="echoid-s5354" xml:space="preserve">10 linear.</s>
            <s xml:id="echoid-s5355" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5356" xml:space="preserve">10260, 31570:</s>
            <s xml:id="echoid-s5357" xml:space="preserve">: 3600, 11135 {115/171}. </s>
            <s xml:id="echoid-s5358" xml:space="preserve">11135 {115/171}=105 + </s>
          </p>
          <p>
            <s xml:id="echoid-s5359" xml:space="preserve">Sive 154 linear. </s>
            <s xml:id="echoid-s5360" xml:space="preserve">habet pondus 205 granorum, quæ per ſe mul-
              <lb/>
            tiplicata dant 31570. </s>
            <s xml:id="echoid-s5361" xml:space="preserve">a breviori Acu abſolvuntur 10 </s>
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