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-s1971" xml:space="preserve">
              <pb o="82" file="0096" n="96" rhead="DISSERTATIO"/>
            evaſit pulvis nigri coloris, qui â Magnete attrahebatur; </s>
            <s xml:id="echoid-s1972" xml:space="preserve">ſed deinde
              <lb/>
            hunc violentiori Igni expoſui in eodem crucibulo ſpatio unius horæ,
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            prodiitque pulvis ex fulvo rubicundus, qui â Magnete fortiter at-
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            trahebatur, imo ad majorem diſtantiam, quam Magnetis pulvis
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            ante ullam inſtitutam operationem.</s>
            <s xml:id="echoid-s1973" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1974" xml:space="preserve">9. </s>
            <s xml:id="echoid-s1975" xml:space="preserve">Quia non ſatis fortem ignem admoveram, repetiiExperimentum,
              <lb/>
            novum pulverem Magnetis cum Salis Ammoniaciæquali copia ſubli-
              <lb/>
            mando, & </s>
            <s xml:id="echoid-s1976" xml:space="preserve">in phiala fortiſſimo igni exponendo; </s>
            <s xml:id="echoid-s1977" xml:space="preserve">in hac operatione
              <lb/>
            Salem Ammoniacum reddidi penitus volatilem, qui ſecum elevave-
              <lb/>
            rat ad phialæ fornicem ex Magnete pulverem flavum, eundem,
              <lb/>
            quem in priori operatione ope Alcoholis vini & </s>
            <s xml:id="echoid-s1978" xml:space="preserve">aquæ ſub forma
              <lb/>
            Tincturæ collegeram: </s>
            <s xml:id="echoid-s1979" xml:space="preserve">remanſitque in fundo phialæ maſſa coloris ex
              <lb/>
            rubro fuſci, quæ in aëre aperto intra diem per deliquium ſolve-
              <lb/>
            batur.</s>
            <s xml:id="echoid-s1980" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1981" xml:space="preserve">10. </s>
            <s xml:id="echoid-s1982" xml:space="preserve">Poſtea ſumſi Magnetis novi pulveriſati & </s>
            <s xml:id="echoid-s1983" xml:space="preserve">Salis Ammoniaci
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            iterum ℨiij. </s>
            <s xml:id="echoid-s1984" xml:space="preserve">quas perfecte miſtas in crucibulo expoſui igni aperto in
              <lb/>
            furno Anemi, ſpatio unius horæ, quo avolavit omnis Sal Ammonia-
              <lb/>
            cus, ſecum ſimul abripiens multum ex Magnete, relinquens tamen
              <lb/>
            in fundo crucibuli pulverem roſei coloris, qui quidem attrahitur â
              <lb/>
            Magnete, ſed parum, & </s>
            <s xml:id="echoid-s1985" xml:space="preserve">modo in parvâ diſtantiâ.</s>
            <s xml:id="echoid-s1986" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1987" xml:space="preserve">11. </s>
            <s xml:id="echoid-s1988" xml:space="preserve">Quod ſi ad omnia, quæ in hoc Proceſſu occurrunt, atten-
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            damus, patet in Magnete dari nonnullas partes, quæ citius red-
              <lb/>
            di poſſunt volatiles, quam aliæ nam illæ, quæ colorem flavum
              <lb/>
            conſtituebant in §. </s>
            <s xml:id="echoid-s1989" xml:space="preserve">1, 2, 4, 5, 7, 9. </s>
            <s xml:id="echoid-s1990" xml:space="preserve">cum Sale Ammoniaco adſcen-
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            derunt; </s>
            <s xml:id="echoid-s1991" xml:space="preserve">quæ vero coloris propius ad nigreſcentem accedentis erant,
              <lb/>
            magis fixæ aut gravioresviſæ ſunt, cum in fundo phialæ remanebant:
              <lb/>
            </s>
            <s xml:id="echoid-s1992" xml:space="preserve">Sed hac operatione non penetramus in artem ſeparandi ex Magnete
              <lb/>
            partes inertes ab iis, quæ maxima virtute donantur, quia, quæ vo-
              <lb/>
            latiles factæ ſunt, æque vim attractricem retinuerunt, quam fixiſſi-
              <lb/>
            mæ, cum partes volatiles orbatæ tantummodo ab adhærente Sale
              <lb/>
            iterum perfecte eandem, quam antea, vim Magneticam oſtende-
              <lb/>
            runt, uti in §. </s>
            <s xml:id="echoid-s1993" xml:space="preserve">4, 7. </s>
            <s xml:id="echoid-s1994" xml:space="preserve">videre licet.</s>
            <s xml:id="echoid-s1995" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1996" xml:space="preserve">12. </s>
            <s xml:id="echoid-s1997" xml:space="preserve">Mirandum tamen eſt, Tincturam Magnetis ſive cum Aqua,
              <lb/>
            ſive cum Alcohole factam, exſiccatam, ut redierit in pulverem §. </s>
            <s xml:id="echoid-s1998" xml:space="preserve">3.
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            </s>
            <s xml:id="echoid-s1999" xml:space="preserve">6, nullum indicium Attractionis habuiſſe, etiamſi Magnetem inſe
              <lb/>
            contineat, qui poſt ulteriorem ignis actionem perpeſſam, ſuas </s>
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