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 handwritten notes

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            <s xml:id="echoid-s2336" xml:space="preserve">
              <pb o="97" file="0111" n="111" rhead="DE MAGNETE."/>
            dum ponderis grani unius: </s>
            <s xml:id="echoid-s2337" xml:space="preserve">inverſi deinde cylindri apici conico etiam
              <lb/>
            apponebatur Acus chalybea, graviſfima fuit ponderis 1 {9/10} grani,
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            quæ geſtari potuit.</s>
            <s xml:id="echoid-s2338" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2339" xml:space="preserve">Diameter ſecundi cylindri fuit {36/100} pollicis, qui etiam ſecundum
              <lb/>
            longitudinem ſuper eodem Magnetis polo ductus fuit, ex illius ex-
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            tremo circulari etiam tantum Acus, gravitate grani unius, appendi
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            potuit, ſed ab omni puncto ſuperficiei circularis attracta ſuſpende-
              <lb/>
            batur: </s>
            <s xml:id="echoid-s2340" xml:space="preserve">Verum inverſo hoc cylindro, ex coni apice deorſum ſpe-
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            ctante ſuſpendi potuerunt aliquot Acus, quarum omnium pondus
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            fuit 7 {1/2} granorum.</s>
            <s xml:id="echoid-s2341" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2342" xml:space="preserve">Tertii cylindri Diameter fuit {12/100} pollicis, ex cujus extremo cir-
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            culari ſuſpendi etiam modo potuit Acus Chalybea ponderis unius
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            grani; </s>
            <s xml:id="echoid-s2343" xml:space="preserve">verum ab apice conico plurimæ gerebantur Acus, quarum
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            omnium ſibi adhærentium pondus erat 8 granorum.</s>
            <s xml:id="echoid-s2344" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2345" xml:space="preserve">Ex quatuor his tentaminibus ſequitur, quo Ferrum eſt craſſius,
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            eo minori viâ Magnete eodem imprægnari, tenuiſſimum enim plu-
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            rimam virtutem, quia maximum onus geſtabat, recepit: </s>
            <s xml:id="echoid-s2346" xml:space="preserve">An tamen
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            Ferrum, quo plus attenuatum, fed ejuſdem longitudinis, ſemper
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            eo majori vi Magnetica imprægnabitur? </s>
            <s xml:id="echoid-s2347" xml:space="preserve">hoc etiam exploratum fuit,
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            eventu tamen probante determinatam poſtulari Ferri craſſitiem, quæ
              <lb/>
            maximum pondus attrahat, aliam vero omnem minorem etiam exi-
              <lb/>
            liori gaudere virtute.</s>
            <s xml:id="echoid-s2348" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2349" xml:space="preserve">Cylindrus enim tenuior, Diametri {12/100} pol. </s>
            <s xml:id="echoid-s2350" xml:space="preserve">ejuſdemque cum priori-
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            bus longitudinis, tantummodo ex apice conico pondus ferreum 4
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            granorum geſtavit: </s>
            <s xml:id="echoid-s2351" xml:space="preserve">& </s>
            <s xml:id="echoid-s2352" xml:space="preserve">fila tenuiora ferrea ſuper eodem deducta Ma-
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            gnetis polo, iterum pondera ferrea leviora tantum attraxerunt:
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            </s>
            <s xml:id="echoid-s2353" xml:space="preserve">quare datur craſſities Ferri, quæ a polo dati Magnetis, maxima vi
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            attractrice induitur, aliaque omnia ferramenta, craſſiora vel te-
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            nuiora minorem vim ab eodem Magnete recipiunt.</s>
            <s xml:id="echoid-s2354" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2355" xml:space="preserve">Extremitates autem conicæ cylindrorum videntur ad apicem ob-
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            tuſum condenſare aut colligere vim Magneticam, quia ex hiſce api-
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            cibus pondus ferreum multo gravius, quam ex plano extremo cir-
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            culari geſtatum fuit: </s>
            <s xml:id="echoid-s2356" xml:space="preserve">Cylindros deſcriptos eum in finem præparave-
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            ram, ut detegerem an inter craſſities, longitudines, & </s>
            <s xml:id="echoid-s2357" xml:space="preserve">vires a Ma-
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            gnete cum ipſis communicatas quædam proportio daretur, ſed mihi
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            ipſi in hiſce Experimentis non ſatisfeci, neſciens utrum majori </s>
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