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-s2149" xml:space="preserve">
              <pb o="89" file="0103" n="103" rhead="DE MAGNETE."/>
            Plumbi additum fuit, quod cum corporibus pluribus terreſtribus,
              <lb/>
            & </s>
            <s xml:id="echoid-s2150" xml:space="preserve">imprimis cum ſilicibus abit in vitrum elegans, pellucidum, fla-
              <lb/>
            vum, pulchritudine certans cum Pruſſico ſuccino: </s>
            <s xml:id="echoid-s2151" xml:space="preserve">Primum igitur
              <lb/>
            indagandum erat, cum quanta copia Minii Magnes in vitrum redu-
              <lb/>
            ceretur, a minima Minii quantitate incipiendum fuit, ut certior
              <lb/>
            ſierem de vi ſuperſtite vel deſtructa Magnetica: </s>
            <s xml:id="echoid-s2152" xml:space="preserve">Adeoque Minii,
              <lb/>
            Magnetis, Borracis ana ℨiij. </s>
            <s xml:id="echoid-s2153" xml:space="preserve">optime miſtas impoſui crucibulo, quod
              <lb/>
            per 3 horas Igni expoſitum validiſſimo, exhibuit modo maſſam ali-
              <lb/>
            quam vix cohærentem, quæ minabatur quaſi in ſolidam ſubſtan-
              <lb/>
            tiam abire vellet, ſi modo plus fluidi admiſtum fuiſſet: </s>
            <s xml:id="echoid-s2154" xml:space="preserve">hæc attra-
              <lb/>
            hebatur a Magnete adhuc ut ante, imo tota ſubſtantia attraheba-
              <lb/>
            tur, æque Minium, Sal, quam Magnes: </s>
            <s xml:id="echoid-s2155" xml:space="preserve">patebat igitur plus Minii
              <lb/>
            addendum eſſe, & </s>
            <s xml:id="echoid-s2156" xml:space="preserve">quia Arenæ triplo plus Minii eſt addendum, ut
              <lb/>
            vitrum inde formetur; </s>
            <s xml:id="echoid-s2157" xml:space="preserve">addidi quoque maſſæ noſtræ tantundem Mi-
              <lb/>
            nii, ut nunc eſſet ejus triplo major copia quam Magnetis, adjecta
              <lb/>
            etiam fuit Borracis drachma: </s>
            <s xml:id="echoid-s2158" xml:space="preserve">hæc maſſa in crucibulo per trihorium
              <lb/>
            ſummo Igni commiſſa, abiit in vitrum opacum fuſci coloris, ad-
              <lb/>
            modum grave, quod fundi ducique poterat, ut vitrum ſolet; </s>
            <s xml:id="echoid-s2159" xml:space="preserve">erat-
              <lb/>
            que homogeneum ubivis. </s>
            <s xml:id="echoid-s2160" xml:space="preserve">Adeoque Magnes in vitrum ſic erat mu-
              <lb/>
            tatus, ſummamque proinde operationem paſſus, quam unquam po-
              <lb/>
            terit: </s>
            <s xml:id="echoid-s2161" xml:space="preserve">[Cauſtici ſpeculi foco excepto] in qua ſi vim ſuam retinet,
              <lb/>
            eam quidem ſemper retinebit.</s>
            <s xml:id="echoid-s2162" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2163" xml:space="preserve">Hoc vitrum itaque oblatum Verſorio, id æque manifeſto attra-
              <lb/>
            xit, quam ante ullam perpeſſam operationem ab Igne: </s>
            <s xml:id="echoid-s2164" xml:space="preserve">Attraheba-
              <lb/>
            tur a Magnete etiam haud aliter, ac ſi verus Magnes fuiſſet quam-
              <lb/>
            obrem hoc vitrum in pulverem tritum a Magnete attrahebatur, ut
              <lb/>
            inſtar barbæ ipſius polis adhæſerit: </s>
            <s xml:id="echoid-s2165" xml:space="preserve">Plumbum in vitrum reductum
              <lb/>
            & </s>
            <s xml:id="echoid-s2166" xml:space="preserve">undiquaque ambiens partes Magnetis non ita impediit ejus vires,
              <lb/>
            quam quidem parva Salis copia in præcedentibus proceſſibus, quod
              <lb/>
            clarius per Experientiam, quam quidem ex ratione intelligitur, ſed
              <lb/>
            plurima in Phyſicis ita comparata ſunt.</s>
            <s xml:id="echoid-s2167" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div48" type="section" level="1" n="48">
          <head xml:id="echoid-head56" xml:space="preserve">PROCESSUS DECIMUS.</head>
          <p>
            <s xml:id="echoid-s2168" xml:space="preserve">Quum Antimonium ſolet ferè omnia metalla in Igne reddere vo-
              <lb/>
            latilia, ea penetrando uſque in intimam medullam, in ſubtiliſſimas
              <lb/>
            ſolvendo partes, & </s>
            <s xml:id="echoid-s2169" xml:space="preserve">ſecum avehendo, tentatum fuit an </s>
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