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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          <p>
            <s xml:id="echoid-s1909" xml:space="preserve">
              <pb o="80" file="0094" n="94" rhead="DISSERTATIO"/>
            ſunt, unumque ſæpe in corpora quædam operatur, alterius vi in
              <lb/>
            ea abſolute ſilente; </s>
            <s xml:id="echoid-s1910" xml:space="preserve">uti quidem non ex hoc, ſed ex aliis liquebit
              <lb/>
            Proceſſibus: </s>
            <s xml:id="echoid-s1911" xml:space="preserve">Sumſi igitur novum pulverem Magneticum, ſed ex
              <lb/>
            eodem Magnete, qui præcedentibus & </s>
            <s xml:id="echoid-s1912" xml:space="preserve">omnibus aliis ſequentibus
              <lb/>
            operationibus inſerviit; </s>
            <s xml:id="echoid-s1913" xml:space="preserve">huic addidi Arſenici ana ℨiij, ambos pul-
              <lb/>
            veres diu & </s>
            <s xml:id="echoid-s1914" xml:space="preserve">bene miſcui, incluſos phialæ vitreæ expoſui igni are-
              <lb/>
            næ bihorii ſpatio, omne Arſenicum ſublimatum fuit, magnaque e-
              <lb/>
            jus pars ex collo phialæ avolavit, relinquens in fundo pulverem Ma-
              <lb/>
            gnetis, nullo modo immutatum, copiâ, colore, aut vi attractrice
              <lb/>
            reſpectu Verſorii, aut alterius Magnetis: </s>
            <s xml:id="echoid-s1915" xml:space="preserve">ex quâ operatione nihil
              <lb/>
            diſcimus, niſi Arſenicum non agere in Magnetem.</s>
            <s xml:id="echoid-s1916" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div42" type="section" level="1" n="42">
          <head xml:id="echoid-head50" xml:space="preserve">PROCESSUS QUARTUS.</head>
          <p>
            <s xml:id="echoid-s1917" xml:space="preserve">Quia Sal Ammoniacus Ferrum volatile reddit, & </s>
            <s xml:id="echoid-s1918" xml:space="preserve">cum eo ſubli-
              <lb/>
            matur, arbitrabar Magnetem vel partim vel penitus volatilem reddi-
              <lb/>
            tum iri, ſi cum hoc Sale urgeretur, neque ê ſpe excidi: </s>
            <s xml:id="echoid-s1919" xml:space="preserve">Sumſi
              <lb/>
            Salis Ammoniaci & </s>
            <s xml:id="echoid-s1920" xml:space="preserve">Magnetis pulveris novi ana ℨiij. </s>
            <s xml:id="echoid-s1921" xml:space="preserve">ambos pulve-
              <lb/>
            res diu contritos & </s>
            <s xml:id="echoid-s1922" xml:space="preserve">miſtos immiſi phialæ vitreæ, quam impoſui igni
              <lb/>
            arenæ, continuato per 3 horas, quem tamen non excitaviſummum,
              <lb/>
            cum lebes arenam continens non ſatis profunde fornaci immiſſus fue-
              <lb/>
            rat: </s>
            <s xml:id="echoid-s1923" xml:space="preserve">exemta & </s>
            <s xml:id="echoid-s1924" xml:space="preserve">diffracta phiala, obſervabatur maſſa in fundo phia-
              <lb/>
            læ cohærens, tamen mollis, & </s>
            <s xml:id="echoid-s1925" xml:space="preserve">facile friabilis in pulverem, parum
              <lb/>
            olens, quæ per medium diffracta, â parte inferiori verſus ſuperio-
              <lb/>
            ra, exhibebat aliquod ſtrata hoc ordine poſita: </s>
            <s xml:id="echoid-s1926" xml:space="preserve">Infimum ſtratum erat
              <lb/>
            tenuiſſimum omnium, coloris obſcuri: </s>
            <s xml:id="echoid-s1927" xml:space="preserve">Stratum ſecundum colorem
              <lb/>
            habebat fulvum; </s>
            <s xml:id="echoid-s1928" xml:space="preserve">tertium colore donabatur luteo: </s>
            <s xml:id="echoid-s1929" xml:space="preserve">quartum erat gry-
              <lb/>
            ſeum, conſtans ex miſtis partibus Magnetis nigris cum albis Salis
              <lb/>
            Ammoniaci: </s>
            <s xml:id="echoid-s1930" xml:space="preserve">quintum ſtratum ſive ſupremum conſtabat ex puris
              <lb/>
            floribus Salis Ammoniaci albiſſimis, levibus, & </s>
            <s xml:id="echoid-s1931" xml:space="preserve">vix cohærenti-
              <lb/>
            bus.</s>
            <s xml:id="echoid-s1932" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1933" xml:space="preserve">Maſſa hæc prope Verſorium 6 pollicum locata, manifeſtos in eo
              <lb/>
            excitavit motus, tam attrahentes, quam repellentes.</s>
            <s xml:id="echoid-s1934" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1935" xml:space="preserve">Ex hoc colore diverſo ſtratorum, tum ex varia eorum gravitate,
              <lb/>
            liquebat Magnetem non eſſe corpus homogeneum & </s>
            <s xml:id="echoid-s1936" xml:space="preserve">ſimplex, ſed
              <lb/>
            eſſe aliquod compoſitum ex pluribus partibus diverſis.</s>
            <s xml:id="echoid-s1937" xml:space="preserve"/>
          </p>
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