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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          <pb o="262" file="0276" n="276" rhead="DISSERTATIO"/>
          <p>
            <s xml:id="echoid-s6252" xml:space="preserve">Si Virga pro hiſce Experimentis quædam longior eligatur, ejus
              <lb/>
            punctum attrahens polum Boreum Verſorii ſemper plus diſtat abex-
              <lb/>
            tremitate Ferri, quam punctum, quod polum Auſtralem Acus affi-
              <lb/>
            cit, quemadmodum olim in Philoſ. </s>
            <s xml:id="echoid-s6253" xml:space="preserve">Tranſ. </s>
            <s xml:id="echoid-s6254" xml:space="preserve">A°. </s>
            <s xml:id="echoid-s6255" xml:space="preserve">1694 obſervatum
              <lb/>
            fuit, & </s>
            <s xml:id="echoid-s6256" xml:space="preserve">nuper etiam tradidit Reaumurius.</s>
            <s xml:id="echoid-s6257" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6258" xml:space="preserve">Eſt profecto admirandum, Ferrum candens, ſed perpendiculari-
              <lb/>
            ter ad horizontem poſitum, vi imbui Magneticâ, cum Magnes ipſe
              <lb/>
            candefactus, & </s>
            <s xml:id="echoid-s6259" xml:space="preserve">deinde perpendiculariter erectus, inter refrigeran-
              <lb/>
            dum nihil virtutis retineat, aut acquirat: </s>
            <s xml:id="echoid-s6260" xml:space="preserve">Boyleus eum in finem
              <lb/>
            Magnetes oblongos, in Igne canderactos, refrigerio expoſuit, aut
              <lb/>
            eos dirigendo verſus Boream & </s>
            <s xml:id="echoid-s6261" xml:space="preserve">Auſtrum, vel horizontaliter ponen-
              <lb/>
            do, vel perpendiculariter, vel in quocunque alio obliquo ſitu, ve-
              <lb/>
            rum nunquam vim attractricem aut directricem in iis ſuperſtitem ob.
              <lb/>
            </s>
            <s xml:id="echoid-s6262" xml:space="preserve">ſervare potuit, vide Magnetic. </s>
            <s xml:id="echoid-s6263" xml:space="preserve">pag. </s>
            <s xml:id="echoid-s6264" xml:space="preserve">499.</s>
            <s xml:id="echoid-s6265" xml:space="preserve"/>
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        <div xml:id="echoid-div164" type="section" level="1" n="164">
          <head xml:id="echoid-head174" xml:space="preserve">EXPERIMENTUM CXXXVII.</head>
          <p>
            <s xml:id="echoid-s6266" xml:space="preserve">Eadem extremitas Verſorii attrahitur vario modo ab extremitati-
              <lb/>
            bus iisdem Virgæ ferreæ, perpendiculariter ad horizontem deten-
              <lb/>
            tæ & </s>
            <s xml:id="echoid-s6267" xml:space="preserve">ipſi oppoſitæ, in diverſis locis Terræ.</s>
            <s xml:id="echoid-s6268" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6269" xml:space="preserve">Quod conſtat ex obſervationibus â nauta captis, inſertisque Phi-
              <lb/>
            loſophicis Tranſactionibus N°. </s>
            <s xml:id="echoid-s6270" xml:space="preserve">177. </s>
            <s xml:id="echoid-s6271" xml:space="preserve">quas nequaquam omittendas
              <lb/>
            judicavi, cum hactenus neminem offendi, qui ſimiles inſtituit: </s>
            <s xml:id="echoid-s6272" xml:space="preserve">con-
              <lb/>
            ſcriptæ autem fuerunt Anno 1684. </s>
            <s xml:id="echoid-s6273" xml:space="preserve">a nauta Æquatorem transanavi-
              <lb/>
            gante.</s>
            <s xml:id="echoid-s6274" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6275" xml:space="preserve">1. </s>
            <s xml:id="echoid-s6276" xml:space="preserve">Ab anglia uſque ad 10 gradus Latitudinis Boreæ, Verſorii
              <lb/>
            pars Borea attrahebat extremitatem Virgæ ferreæ ſuperiorem; </s>
            <s xml:id="echoid-s6277" xml:space="preserve">Ver-
              <lb/>
            ſorii pars Auſtralis, attrahebat Virgæ inferius extremum.</s>
            <s xml:id="echoid-s6278" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6279" xml:space="preserve">2. </s>
            <s xml:id="echoid-s6280" xml:space="preserve">Ad Latitudinem Boream 9°, 42?</s>
            <s xml:id="echoid-s6281" xml:space="preserve">. ad Longitudinem a Lizard,
              <lb/>
            verſus Occaſum, extremum Verſorii Auſtralem fortiter attrahebat
              <lb/>
            Virgæ infimum: </s>
            <s xml:id="echoid-s6282" xml:space="preserve">Sed Verſorii extremitas Borea non tam fortiter
              <lb/>
            attrahebat partem ſuperiorem virgæ, quam ſupra.</s>
            <s xml:id="echoid-s6283" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6284" xml:space="preserve">3. </s>
            <s xml:id="echoid-s6285" xml:space="preserve">Ad Latitudinem Boream 4°, 33?</s>
            <s xml:id="echoid-s6286" xml:space="preserve">. ad Lougitudinem 5°. </s>
            <s xml:id="echoid-s6287" xml:space="preserve">18? </s>
            <s xml:id="echoid-s6288" xml:space="preserve">a
              <lb/>
            Lizard, verſus Occaſum, Verſorii pars Borea incipiebat declinare
              <lb/>
            a parte ſuprema Virgæ, & </s>
            <s xml:id="echoid-s6289" xml:space="preserve">Verſorii Auſtralis pars inclinabat fortius
              <lb/>
            verſus partem infimam Virgæ.</s>
            <s xml:id="echoid-s6290" xml:space="preserve"/>
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