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

Table of contents

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[31.] EXPERIMENTUM XXIII.
Page: 69 (55)
[32.] EXPERIMENTUM XXIV.
Page: 71 (57)
[33.] EXPERIMENTUM XXV.
Page: 74 (60)
[34.] EXPERIMENTUM. XXVI.
Page: 80 (66)
[35.] EXPERIMENTUM XXVII.
Page: 83 (69)
[36.] EXPERIMENTUM. XXVIII.
Page: 83 (69)
[37.] EXPERIMENTUM XXIX.
Page: 85 (71)
[38.] EXPERIMENTUM XXX.
Page: 90 (76)
[39.] PROCESSUS PRIMUS.
Page: 91 (77)
[40.] PROCESSUS SECUNDUS.
Page: 92 (78)
[41.] PROCESSUS TERTIUS.
Page: 93 (79)
[42.] PROCESSUS QUARTUS.
Page: 94 (80)
[43.] PROCESSUS QUINTUS.
Page: 97 (83)
[44.] PROCESSUS SEXTUS.
Page: 99 (85)
[45.] PROCESSUS SEPTIMUS.
Page: 100 (86)
[46.] PROCESSUS OCTAVUS.
Page: 101 (87)
[47.] PROCESSUS NONUS.
Page: 102 (88)
[48.] PROCESSUS DECIMUS.
Page: 103 (89)
[49.] PROCESSUS UNDECIMUS.
Page: 104 (90)
[50.] PROCESSUS DUODECIMUS.
Page: 106 (92)
[51.] EXPERIMENTUM XXXI.
Page: 110 (96)
[52.] EXPERIMENTUM XXXII.
Page: 115 (101)
[53.] EXPERIMENTUM XXXIII.
Page: 115 (101)
[54.] EXPERIMENTUM XXXIV.
Page: 116 (102)
[55.] EXPERIMENTUM. XXXV.
Page: 117 (103)
[56.] EXPERIMENTUM. XXXVI.
Page: 117 (103)
[57.] EXPERIMENTUM XXXVII.
Page: 118 (104)
[58.] EXPERIMENTUM XXXVIII.
Page: 118 (104)
[59.] EXPERIMENTUM XXXIX.
Page: 119 (105)
[60.] EXPERIMENTUM XL.
Page: 120 (106)
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          <head xml:id="echoid-head59" xml:space="preserve">EXPERIMENTUM XXXI.</head>
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            <s xml:id="echoid-s2313" xml:space="preserve">Communis eſt ſententia, Ferrum ſuper polo Magnetis ductum vi-
              <lb/>
            ribus attrahentibus imprægnari, eam tamen obſervatione oppoſita
              <lb/>
            dubiam olim reddidit Cl. </s>
            <s xml:id="echoid-s2314" xml:space="preserve">de La Hire in L’Hiſt. </s>
            <s xml:id="echoid-s2315" xml:space="preserve">de L’Acad. </s>
            <s xml:id="echoid-s2316" xml:space="preserve">Roy.
              <lb/>
            </s>
            <s xml:id="echoid-s2317" xml:space="preserve">A°. </s>
            <s xml:id="echoid-s2318" xml:space="preserve">1692. </s>
            <s xml:id="echoid-s2319" xml:space="preserve">Quum virgæ ferreæ, 6 pollices longæ, 4 lineas craſſæ,
              <lb/>
            præſtantem Magnetem aliquoties applicatum nullas attrahendi vires
              <lb/>
            communicaſſe memorat, etiamſi virgis tenuioribus quamplurimum
              <lb/>
            virtutis impertiretur, quamobrem determinatæ craſſitiei deſidera-
              <lb/>
            retur Ferrum, quod a Magnete vim recipere poſſet, nequaquam
              <lb/>
            ad id conducente Ferro admodum craſſo: </s>
            <s xml:id="echoid-s2320" xml:space="preserve">examine dignum viſum
              <lb/>
            fuit hoc Experimentum, ut inde cognoſceretur, quomodo Magnes
              <lb/>
            cum Ferro vires ſuas communicat: </s>
            <s xml:id="echoid-s2321" xml:space="preserve">Parallelopipedum ferreum, 6
              <lb/>
            longum pollices, unum latum altumque; </s>
            <s xml:id="echoid-s2322" xml:space="preserve">ſuper Magnetis, (cujus
              <lb/>
            pondus erat 1 {1/4} libræ, & </s>
            <s xml:id="echoid-s2323" xml:space="preserve">tanta vis, ut ex armatura 7 Librarum ge-
              <lb/>
            ſtaret) polo aliquoties juxta longitudinem ductum fuit, hujus pla-
              <lb/>
            næ extremitati, æque ac marginibus & </s>
            <s xml:id="echoid-s2324" xml:space="preserve">angulis adhærebat pulvis
              <lb/>
            Indicus, & </s>
            <s xml:id="echoid-s2325" xml:space="preserve">ſcobs ferrea attracta, ab angulo aut margine Acus te-
              <lb/>
            nuiſſima, vix {3/4} ponderis grani, parumper attrahebatur, non tamen
              <lb/>
            tota geſtari potuit; </s>
            <s xml:id="echoid-s2326" xml:space="preserve">quamobrem hoc Ferrum vi Magnetica, licet exi-
              <lb/>
            gua, imprægnatum fuiſſe, liquido conſtabat: </s>
            <s xml:id="echoid-s2327" xml:space="preserve">deinde exploratum
              <lb/>
            fuit, an eadem moles ferrea majores acquireret tempore longiori
              <lb/>
            ab eodem Magnete vires, hæc applicata ideo diei ſpatio Lapidi man-
              <lb/>
            ſit, tum iterum pulveri Indico immiſſa, Acui chalybeæ tenui ap-
              <lb/>
            poſita, eaſdem, non majores, attractrices vires oſtendit, quas
              <lb/>
            nec auxerunt repetiti eidem Magnetis polo affrictus.</s>
            <s xml:id="echoid-s2328" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2329" xml:space="preserve">2°. </s>
            <s xml:id="echoid-s2330" xml:space="preserve">Tres fuerunt præparati cylindri ferrei, æque longi, ſinguli
              <lb/>
            4 pollicum & </s>
            <s xml:id="echoid-s2331" xml:space="preserve">unius lineæ: </s>
            <s xml:id="echoid-s2332" xml:space="preserve">extremitate una plana & </s>
            <s xml:id="echoid-s2333" xml:space="preserve">circulari ter-
              <lb/>
            minabantur, altera conica; </s>
            <s xml:id="echoid-s2334" xml:space="preserve">fuerunt omnium conorum altitudines
              <lb/>
            {2/10} pollicis: </s>
            <s xml:id="echoid-s2335" xml:space="preserve">diameter craſſiſſimi cylindri fuit {50/100} pollic. </s>
            <s xml:id="echoid-s2336" xml:space="preserve">cylindro
              <lb/>
            hoc ſecundum totam longitudinem aliquoties ſuper Magnetis polo
              <lb/>
            ducto, tum perpendiculariter ſuſpenſo ad horizontem, baſi circu-
              <lb/>
            lari deorſum ſpectante, appoſita fuit Acus chalybea nova, graviſſi-
              <lb/>
            ma, quæ elevari poterat, quod variis explorabatur tentaminibus,
              <lb/>
            tum vix ex circulari ſuperficie ſuſtenta fuit Acus tenuiſſima, </s>
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