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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            <s xml:id="echoid-s2390" xml:space="preserve">
              <pb o="99" file="0113" n="113" rhead="DE MAGNETE."/>
            tudo major quoque diametro cylindri.</s>
            <s xml:id="echoid-s2391" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2392" xml:space="preserve">Corol. </s>
            <s xml:id="echoid-s2393" xml:space="preserve">2. </s>
            <s xml:id="echoid-s2394" xml:space="preserve">Quanta quoque eſt diſcrepantia virium communicatarum
              <lb/>
            cum parallelopipedis, prout latitudine vel altitudine ſua Magnetem at-
              <lb/>
            tigerint? </s>
            <s xml:id="echoid-s2395" xml:space="preserve">Suſpicaremur Ferrum latitudine & </s>
            <s xml:id="echoid-s2396" xml:space="preserve">altitudine ſimul ſuper
              <lb/>
            Magnete ductum majores ablaturum vires, quam ſi modo latitudi-
              <lb/>
            ne ſua Magneti affrictum fuiſſet, quod in primo parallelopipedo vi-
              <lb/>
            debatur obſervari, ſed in ſecundo & </s>
            <s xml:id="echoid-s2397" xml:space="preserve">tertio obtinet contrarium, cum
              <lb/>
            in iis vires, antea magnæ, imminuantur plurimum, affrictu alti-
              <lb/>
            tudinis, ſequente eum latitudinis.</s>
            <s xml:id="echoid-s2398" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2399" xml:space="preserve">Corol. </s>
            <s xml:id="echoid-s2400" xml:space="preserve">3. </s>
            <s xml:id="echoid-s2401" xml:space="preserve">Si comparemus vim attractricem in parallelopipedo 6
              <lb/>
            pollices longo, unum pollicem alto latoque, cum iis parallelopipe-
              <lb/>
            di primi 4 pollices longo, erunt circiter ut 1 ad 50. </s>
            <s xml:id="echoid-s2402" xml:space="preserve">attamen ſi ut-
              <lb/>
            riuſque craſſitiei habeatur ratio, erit hæc primi Ferri ad alterius ut
              <lb/>
            11 {496/864} ad 1. </s>
            <s xml:id="echoid-s2403" xml:space="preserve">quamobrem ſi vis proportionalis craſſitiei communica-
              <lb/>
            retur. </s>
            <s xml:id="echoid-s2404" xml:space="preserve">geſtanda fuiſſent a parallelopipedo unum pollicem craſſo, 2
              <lb/>
            circiter grana, cum modo {1/4} attracta fuit; </s>
            <s xml:id="echoid-s2405" xml:space="preserve">datur igitur quædam craſ-
              <lb/>
            ſities Ferri in determinata longitudine, quæ viribus ſummis a Ma-
              <lb/>
            gnete imprægnatur, ultra quam craſſiora ferramenta, æque ac te-
              <lb/>
            nuiora minores vires recipiunt; </s>
            <s xml:id="echoid-s2406" xml:space="preserve">Nam lamella 4 longa pollices lata
              <lb/>
            {25/100} poll. </s>
            <s xml:id="echoid-s2407" xml:space="preserve">alta {1/100} affricta eidem polo Magnetis, inde abſtulit vires,
              <lb/>
            quibus modo 12 grana geſtabat.</s>
            <s xml:id="echoid-s2408" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2409" xml:space="preserve">Incideram, memorata intuitus Experimenta, in ſuſpicionem;
              <lb/>
            </s>
            <s xml:id="echoid-s2410" xml:space="preserve">Magnetem vibrationibus tremulis agitari, in his vim conſiſtere, eas
              <lb/>
            cum Ferro ſibi applicato communicari, idcirco in hoc obſervari ma-
              <lb/>
            jores quam in altero, quia facilius recipiuntur. </s>
            <s xml:id="echoid-s2411" xml:space="preserve">& </s>
            <s xml:id="echoid-s2412" xml:space="preserve">melius retinentur: </s>
            <s xml:id="echoid-s2413" xml:space="preserve">
              <lb/>
            Quoniam vero pannus fidibus pulſatis ſonantibuſque applicatus, ex-
              <lb/>
            templo tremores ſonoſque ſuffocat, videbatur quoque vibrationes
              <lb/>
            Magnetis imminuturus aut deleturus; </s>
            <s xml:id="echoid-s2414" xml:space="preserve">ſuper polo eodem Magnetis
              <lb/>
            triplicato panno obducto parallelopipedum tertium (ejus prioribus
              <lb/>
            viribus in Igne expulſis) aliquoties ductum fuit, nihilominus inde
              <lb/>
            abſtulit vim attractricem 9 granorum. </s>
            <s xml:id="echoid-s2415" xml:space="preserve">Deinde pannus duplicatus
              <lb/>
            modo obductus fuit polo, idem Ferrum ſupra pannum trajectum vim
              <lb/>
            recepit elevandi grana 17. </s>
            <s xml:id="echoid-s2416" xml:space="preserve">tandem ſimplici obducebatur polus pan-
              <lb/>
            no, idemque trajectum ferrum vim habuit geſtandi 47 grana: </s>
            <s xml:id="echoid-s2417" xml:space="preserve">ex-
              <lb/>
            pulſa in Igne vi Magnetica ex ferro, ad intervallum 3 linearum
              <lb/>
            a Magnete iterum juxta polum trajectum eſt parallelopipedum, </s>
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