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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[141.] EXPERIMENTUM CXV.
Page: 254 (240)
[142.] EXPERIMENTUM CXVI.
Page: 255 (241)
[143.] EXPERIMENTUM CXVII.
Page: 256 (242)
[144.] EXPERIMENTUM CXVIII.
Page: 256 (242)
[145.] EXPERIMENTUM CXIX.
Page: 257 (243)
[146.] EXPERIMENTUM CXX.
Page: 257 (243)
[147.] EXPERIMENTUM CXXI.
Page: 258 (244)
[148.] EXPERIMENTUM CXXII.
Page: 259 (245)
[149.] EXPERIMENTUM CXXIII.
Page: 260 (246)
[150.] EXPERIMENTUM CXXIV.
Page: 260 (246)
[151.] EXPERIMENTUM CXXV.
Page: 261 (247)
[152.] EXPERIMENTUM CXXVI.
Page: 261 (247)
[153.] EXPERIMENTUM CXXVII.
Page: 262 (248)
[154.] EXPERIMENTUM CXXVIII.
Page: 263 (249)
[155.] EXPERIMENTUM CXXIX.
Page: 263 (249)
[156.] EXPERIMENTUM CXXX.
Page: 264 (250)
[157.] CAPUT QUINTUM. De vi Magnetica Ferri.
Page: 267 (253)
[158.] EXPERIMENTUM CXXXI.
Page: 268 (254)
[159.] EXPERIMENTUM CXXXII.
Page: 269 (255)
[160.] EXPERIMENTUM CXXXIII.
Page: 270 (256)
[161.] EXPERIMENTUM CXXXIV.
Page: 272 (258)
[162.] EXPERIMENTUM CXXXV.
Page: 273 (259)
[163.] EXPERIMENTUM CXXXVI.
Page: 274 (260)
[164.] EXPERIMENTUM CXXXVII.
Page: 276 (262)
[165.] EXPERIMENTUM CXXXVIII.
Page: 279 (265)
[166.] EXPERIMENTUM CXXXIX.
Page: 279 (265)
[167.] EXPERIMENTUM CXL.
Page: 280 (266)
[168.] EXPERIMENTUM CXLI.
Page: 281 (267)
[169.] EXPERIMENTUM CXLII.
Page: 281 (267)
[170.] EXPERIMENTUM CXLIII.
Page: 281 (267)
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            <s xml:id="echoid-s5612" xml:space="preserve">Quo plures laminæ Magnetem hunc componant, quo longiores
              <lb/>
            fuerint, quo ſupra liberaliorem ductæ lapidem, eo præſtantioris
              <lb/>
            virtutis erit; </s>
            <s xml:id="echoid-s5613" xml:space="preserve">nam ſingulæ lamellæ inſtar Magnetis ſunt, unius vis
              <lb/>
            adjuvat eam alterius, hinc aucto lamellarum numero, etiam ſum-
              <lb/>
            ma virium augetur, quemadmodum Magnetes plures in unum bene
              <lb/>
            coagmentati majorem vim attrahendi habent, quam unus alterve
              <lb/>
            ſeorſim ſumtus: </s>
            <s xml:id="echoid-s5614" xml:space="preserve">Non tamen quantitas virium attrahentium adutrum-
              <lb/>
            que armaturæ pedem ſequitur numerum lamellarum, ſed eſt in mi-
              <lb/>
            nori ratione, quia quo vis a pede plus diſtat, eo minor evadit, uti
              <lb/>
            ſuperius quoque demonſtravi in Magnetibus majoribus, quorum vis
              <lb/>
            ſemper eſt proportionaliter minor, quam in minoribus: </s>
            <s xml:id="echoid-s5615" xml:space="preserve">Memoranda hic
              <lb/>
            eſt obſervatio Hartſoekeri, quam inſeruit ſcripto, cui titulus Eclairciſ-
              <lb/>
            ſemens des Conjectur. </s>
            <s xml:id="echoid-s5616" xml:space="preserve">Phyſiq. </s>
            <s xml:id="echoid-s5617" xml:space="preserve">pag. </s>
            <s xml:id="echoid-s5618" xml:space="preserve">92. </s>
            <s xml:id="echoid-s5619" xml:space="preserve">Vires attractrices, ſingularum
              <lb/>
            laminarum, quæ ejuſdem magnitudinis cum deſcriptis ſunt, deprehen-
              <lb/>
            dit eſſe 6 unciarum; </s>
            <s xml:id="echoid-s5620" xml:space="preserve">Magnes ex 18 ejuſmodi laminis compoſitus eleva-
              <lb/>
            bat pondus ferreum 6 vel 7 librarum: </s>
            <s xml:id="echoid-s5621" xml:space="preserve">Elapſis ſex ſeptimanis Magnes
              <lb/>
            hic fortior evaſit, & </s>
            <s xml:id="echoid-s5622" xml:space="preserve">plus ponderis tulit; </s>
            <s xml:id="echoid-s5623" xml:space="preserve">ſingulæ tamen lamellæ
              <lb/>
            ſeorſim examinatæ imbecilliores erant, ferentes tantum unciam ſes-
              <lb/>
            qui, aut uncias duas; </s>
            <s xml:id="echoid-s5624" xml:space="preserve">hæ denuo ſibi impoſitæ, tantundem quam
              <lb/>
            ante diſſolutionem geſtabant, interim earum ambo poli viribus æ-
              <lb/>
            qualibus gaudebant. </s>
            <s xml:id="echoid-s5625" xml:space="preserve">Nec de obſervatione dubitandum, quia idem
              <lb/>
            deprehendi in meo artiſiciali Magnete; </s>
            <s xml:id="echoid-s5626" xml:space="preserve">videtur vis Magnetica in
              <lb/>
            principio ab armatura lamellarum non tam bene capi potuiſſe, quam
              <lb/>
            quidem aliquo elapſo tempore, præterea per unitam maſſam æqua-
              <lb/>
            biliter diſtribuitur pedetentim, ita ut ambo ejus poli æquale pondus
              <lb/>
            geſtare queant.</s>
            <s xml:id="echoid-s5627" xml:space="preserve"/>
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          <head xml:id="echoid-head148" xml:space="preserve">EXPERIMENTUM CXIII.</head>
          <p>
            <s xml:id="echoid-s5628" xml:space="preserve">Filum ferreum tenue, admodum flexile, ſuper Magnete ductum,
              <lb/>
            ejus viribus imprægnetur, deinde flectatur in varias formas, & </s>
            <s xml:id="echoid-s5629" xml:space="preserve">di-
              <lb/>
            verſos angulos; </s>
            <s xml:id="echoid-s5630" xml:space="preserve">& </s>
            <s xml:id="echoid-s5631" xml:space="preserve">ſint flexiones tam validæ, ut ſignum inflexio-
              <lb/>
            nis, ſive exaſperatæ ſuperficiei poſt ſe relinquant, omnis plerum-
              <lb/>
            que vis attractrix profligata ex filo obſervabitur.</s>
            <s xml:id="echoid-s5632" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5633" xml:space="preserve">In his inflexionibus ſitus partium mutatur, aliis ſe contingenti-
              <lb/>
            bus poſt flexionem, quam ante, nihil ſubſtantiæ periit, nihil </s>
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