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 Notes

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              <pb o="125" file="0139" n="139" rhead="DE MAGNETE."/>
            trioli, quod Limaturam ſolvebat, elapſis circiter duobus minutis,
              <lb/>
            Acus reliquit phialam aliquomodo, petens directionem priſtinam
              <lb/>
            ſibique naturalem; </s>
            <s xml:id="echoid-s3024" xml:space="preserve">quo Limaturæ major quantitas ſolvebatur, eo
              <lb/>
            Acus etiam magis recedebat a phiala; </s>
            <s xml:id="echoid-s3025" xml:space="preserve">nunquam tamen accurate in
              <lb/>
            ſitum priſtinum rediit: </s>
            <s xml:id="echoid-s3026" xml:space="preserve">idem contigit cum ſolvebam Ferrum in Spi-
              <lb/>
            ritu Nitri Glauberi, aut Aqua forti vulgari: </s>
            <s xml:id="echoid-s3027" xml:space="preserve">vis attrahens ſemper
              <lb/>
            imminuta erat, non penitus tamen ſublata: </s>
            <s xml:id="echoid-s3028" xml:space="preserve">Ex ſolutione Ferri præ-
              <lb/>
            paravi vitriolum Martis, quod admodum ſiccum, & </s>
            <s xml:id="echoid-s3029" xml:space="preserve">oppoſitum cuſ-
              <lb/>
            pidi Acus 6 pollicum, eam parum attraxit, attamen oculo diſtin-
              <lb/>
            gui poterat cuſpide ad {1/4} gradus ex ſuo loco recedente, ſimulac vi-
              <lb/>
            triolum prope ipſam tenebatur: </s>
            <s xml:id="echoid-s3030" xml:space="preserve">repetii hoc Experimentum aliquo-
              <lb/>
            ties, in initio opinatus me decipi, cum acutus Lemmerius in L’Hiſt.
              <lb/>
            </s>
            <s xml:id="echoid-s3031" xml:space="preserve">de L’Acad. </s>
            <s xml:id="echoid-s3032" xml:space="preserve">Roy. </s>
            <s xml:id="echoid-s3033" xml:space="preserve">A°. </s>
            <s xml:id="echoid-s3034" xml:space="preserve">1706. </s>
            <s xml:id="echoid-s3035" xml:space="preserve">obſervaverit, vitriolum Martis non
              <lb/>
            attrahere Magnetem, forte non inſtituit cum Acu tam longa, nam
              <lb/>
            in breviori & </s>
            <s xml:id="echoid-s3036" xml:space="preserve">vulgari Acu nequidem oculatiſſimus motum ullum at-
              <lb/>
            tractionis obſervabit, ſed tantum in longiſſima conſpici potuit: </s>
            <s xml:id="echoid-s3037" xml:space="preserve">De-
              <lb/>
            creverat hæc vis attractionis ex Limatura, cum ſolvebatur, quia omnes
              <lb/>
            ejus partes a ſe removebantur, variiſque directionibus ſimul agita-
              <lb/>
            tæ, haud aliter quam Limatura in præcedenti Experimento con-
              <lb/>
            cuſſa, vim ſuam amittunt. </s>
            <s xml:id="echoid-s3038" xml:space="preserve">Hæc ſolutio Ferri præmiſſa fuit, ut
              <lb/>
            melius poſſet Ferrum ſuo Sulphure orbari, id enim fortiſſime ad-
              <lb/>
            hæret Spiritibus acidis, & </s>
            <s xml:id="echoid-s3039" xml:space="preserve">cum iis ope Ignis facile avolat: </s>
            <s xml:id="echoid-s3040" xml:space="preserve">Ex Vi-
              <lb/>
            triolo immiſſo retortæ eduxi Spiritum acidum cum Sulphure mixtum
              <lb/>
            vi Ignis, donec materia in fundo reſtans rubri eſſet coloris, quæ
              <lb/>
            vocatur vulgo Colcotar Vitrioli: </s>
            <s xml:id="echoid-s3041" xml:space="preserve">hoc appoſitum Acui eidem lon-
              <lb/>
            giſſimæ, motum excitavit, ſed parvum, majorem tamen priori,
              <lb/>
            quem ſolum Vitriolum ediderat: </s>
            <s xml:id="echoid-s3042" xml:space="preserve">Spiritus acidus in phiala collectus
              <lb/>
            appoſitusque apici nullum ſignum attractionis oſtendit; </s>
            <s xml:id="echoid-s3043" xml:space="preserve">quamob-
              <lb/>
            rem concludo; </s>
            <s xml:id="echoid-s3044" xml:space="preserve">Sulphur Ferri non eſſe cauſam virtutis Magneticæ.</s>
            <s xml:id="echoid-s3045" xml:space="preserve"/>
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            <s xml:id="echoid-s3046" xml:space="preserve">Deinde Colcotar impoſui igni violentiſſimo in crucibulo terreo,
              <lb/>
            quod evaſit tandem maſſa nigra & </s>
            <s xml:id="echoid-s3047" xml:space="preserve">rara, in qua non amplius ullum indi-
              <lb/>
            eium Sulphuris erat, quemadmodum bene adnotavit Cl. </s>
            <s xml:id="echoid-s3048" xml:space="preserve">Lemmerius:
              <lb/>
            </s>
            <s xml:id="echoid-s3049" xml:space="preserve">hæc enim erat friabilis facile in pulverem, injecta Igni non ſcintillabat,
              <lb/>
            veluti limatura Ferri facit, & </s>
            <s xml:id="echoid-s3050" xml:space="preserve">Sale omni etiam orbata videtur, cum
              <lb/>
            nunquam rubiginem contrahat nec in aëre, nec in aqua ſalſa; </s>
            <s xml:id="echoid-s3051" xml:space="preserve">etiam
              <lb/>
            vix dat Tincturam, non efferveſcit cum Oleo Vitrioli, nec cum Spi-
              <lb/>
            ritu Salis, aut Spiritu Nitri.</s>
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