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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            ſiderari: </s>
            <s xml:id="echoid-s5041" xml:space="preserve">huc uſque tantum aliquid de Magnete ſubolfacimus, quem
              <lb/>
            ignoraverunt penitus antiqui: </s>
            <s xml:id="echoid-s5042" xml:space="preserve">id laudis nobis ſufficiat; </s>
            <s xml:id="echoid-s5043" xml:space="preserve">nos plura
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            illis tentaſſe, obſervaſſe aliquem progreſſum, aliquem motus ordi-
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            nem antea incognitum, idque noſtri temporis Philoſophis ſufficere
              <lb/>
            judicavit Fontenellius in L’Hiſt. </s>
            <s xml:id="echoid-s5044" xml:space="preserve">de L’Acad. </s>
            <s xml:id="echoid-s5045" xml:space="preserve">Roy. </s>
            <s xml:id="echoid-s5046" xml:space="preserve">A°. </s>
            <s xml:id="echoid-s5047" xml:space="preserve">1712, ne
              <lb/>
            animo deſpondeant in mediis Anomaliis, quibus Magnes abunde
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            luxuriat: </s>
            <s xml:id="echoid-s5048" xml:space="preserve">Hæreat igitur Magnes in imis Terræ viſceribus, ad quem o-
              <lb/>
            mnes noſtri Magnetes, omnes Acus Nauticæ & </s>
            <s xml:id="echoid-s5049" xml:space="preserve">Inclinatoriæ, omne
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            Ferrum denique dirigitur attractum, eodem modo ac a noſtris Magneti-
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            bus attrahuntur alii, nihilominus id reſtat, quomodo & </s>
            <s xml:id="echoid-s5050" xml:space="preserve">â quâ cauſâ iſta
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            attractio perficiatur: </s>
            <s xml:id="echoid-s5051" xml:space="preserve">Cauſa effectuum ſimilium procul omni dubio
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            erit eadem; </s>
            <s xml:id="echoid-s5052" xml:space="preserve">quæ enim noſtros Magnetes ad ſe appropinquare facit,
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            ea Magnetes in ſuperficie Terræ dirigit trahitque verſus grandem
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            iſtum in Terræ gremio concluſum Magnetem: </s>
            <s xml:id="echoid-s5053" xml:space="preserve">An hæc cauſa erunt
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            effluvia corporea, aut fluidum aliquod perpetuo curſu agitatum,
              <lb/>
            quod ex imis Terræ penetralibus egreſſum, circulum circa Terram
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            obit, per Aërem, & </s>
            <s xml:id="echoid-s5054" xml:space="preserve">ipſam Terræ ſubſtantiam circumlatum rapi-
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            diſſimi inſtar fluminis, quod ſecum abripit Magnetes noftros, Acus,
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            & </s>
            <s xml:id="echoid-s5055" xml:space="preserve">Ferrum omne, dirigitque certas verſus plagas? </s>
            <s xml:id="echoid-s5056" xml:space="preserve">Nequaquam profe-
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            cto, evicimus enim ſuperius plurimis argumentis ex experimentis
              <lb/>
            tantummodo petitis, Magnetes noſtros non regi ab effluviis, nec
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            quocunque alio admiſſo fluido explicari poſſe phænomena, con-
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            feſſi fuimus poſt totidem examina animum hebeſcere, neque cauſam
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            divinari, aut demonſtrari potuiſſe: </s>
            <s xml:id="echoid-s5057" xml:space="preserve">eadem abdita hic regnat cauſa;
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            </s>
            <s xml:id="echoid-s5058" xml:space="preserve">priorem qui invenerit, hanc quoque intelliget, ab ea tantum di-
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            verſam magnitudine, non operatione attrahente vel dirigente: </s>
            <s xml:id="echoid-s5059" xml:space="preserve">an-
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            tequam igitur demonſtrari Geometrice poſſit directio Verſorii, In-
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            clinatio Acus, & </s>
            <s xml:id="echoid-s5060" xml:space="preserve">virium agentium quantitas, exſpectandum erit, do-
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            nec cauſa Magueticarum virium eruta fuerit.</s>
            <s xml:id="echoid-s5061" xml:space="preserve"/>
          </p>
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            <s xml:id="echoid-s5062" xml:space="preserve">Utcunque exiguum in Magnetica doctrina fecerimus progreſſum,
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            nihilominus experimentorum ope errores antiquorum deteximus, at
              <lb/>
            que eſſe abſonas eorum hypotheſes, nimiſque temere effictas, qua-
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            rum ope directionem Magnetis ſe explicare confifi ſunt: </s>
            <s xml:id="echoid-s5063" xml:space="preserve">Adeamus
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            veterum ſcholas, atque breviter percurramus opiniones præcipuas,
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            omnes enim examinaſſe non juvat.</s>
            <s xml:id="echoid-s5064" xml:space="preserve"/>
          </p>
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            <s xml:id="echoid-s5065" xml:space="preserve">Fuerunt nonnulli, qui explicituri, quare ad Septentrionem </s>
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