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="341" file="0355" n="355" rhead="DE SPECULIS VITREIS."/>
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        <div xml:id="echoid-div239" type="section" level="1" n="239">
          <head xml:id="echoid-head262" xml:space="preserve">EXPERIMENTUM V.</head>
          <p>
            <s xml:id="echoid-s8365" xml:space="preserve">Si ambo ſpecula ſicciſſima & </s>
            <s xml:id="echoid-s8366" xml:space="preserve">puriſſima ſibi imponantur, ita ut
              <lb/>
            nihil ſit intermedium, quodilla ſeparet, atque apprima tur adſe, im-
              <lb/>
            poſita margine inferiori Aquæ, hæc adſcendet intra commiſſuram
              <lb/>
            ſub forma dentium ſerræ, uti ſupra expoſui, & </s>
            <s xml:id="echoid-s8367" xml:space="preserve">uſque ad margi-
              <lb/>
            nem ſuperiorem elevabitur, a quâ tamen diſtabit ſemper poll.
              <lb/>
            </s>
            <s xml:id="echoid-s8368" xml:space="preserve">0. </s>
            <s xml:id="echoid-s8369" xml:space="preserve">1.</s>
            <s xml:id="echoid-s8370" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s8371" xml:space="preserve">An ad quamcunque altitudinem adſcenderet Aqua intra hæc ſpe-
              <lb/>
            cula non determino, ſpecula enim, quibuſcum hæc Experimenta inſti-
              <lb/>
            tui, parvam altitudinem, novem nempe pollicum modo habebant.</s>
            <s xml:id="echoid-s8372" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s8373" xml:space="preserve">Adſcendit autem Aqua inter ſpecula, licet ſibi ſint impoſita,
              <lb/>
            quia aſperam habent ſuperſiciem; </s>
            <s xml:id="echoid-s8374" xml:space="preserve">& </s>
            <s xml:id="echoid-s8375" xml:space="preserve">ideo intetvalla ſatis patula re-
              <lb/>
            linquunt, quæ particulas Aquæ recipere poſſunt.</s>
            <s xml:id="echoid-s8376" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s8377" xml:space="preserve">Quoſuperficies fuerint magis politæ, eo propius ſibiſpecula apponi
              <lb/>
            poterunt, & </s>
            <s xml:id="echoid-s8378" xml:space="preserve">eo altius Aqua elevabitur; </s>
            <s xml:id="echoid-s8379" xml:space="preserve">quare diverſa altitudo
              <lb/>
            Aquæ obſervabitur pro variâ aſperitate vel politurâ ſuperſicie-
              <lb/>
            rum.</s>
            <s xml:id="echoid-s8380" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s8381" xml:space="preserve">Scholion. </s>
            <s xml:id="echoid-s8382" xml:space="preserve">Attrahunt hæc ſpecula ſe mutuo vi inſigni, ſicciſſima
              <lb/>
            enim & </s>
            <s xml:id="echoid-s8383" xml:space="preserve">pura, ſibi tantum impoſita, adeo cohærent, ut elevato ſu-
              <lb/>
            premo horizontaliter, alterum maneat applicatum parti inferiori,
              <lb/>
            nec corpus videatur ad Magnetem propius accedere, quam ejuſmodi
              <lb/>
            vitrum: </s>
            <s xml:id="echoid-s8384" xml:space="preserve">ne autem quis preſſionem Aëris hic invocet, nam in va-
              <lb/>
            cuo Boyleano obſervatur omnino idem.</s>
            <s xml:id="echoid-s8385" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div240" type="section" level="1" n="240">
          <head xml:id="echoid-head263" xml:space="preserve">EXPERIMENTUM VI.</head>
          <p>
            <s xml:id="echoid-s8386" xml:space="preserve">Tab. </s>
            <s xml:id="echoid-s8387" xml:space="preserve">13. </s>
            <s xml:id="echoid-s8388" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s8389" xml:space="preserve">16. </s>
            <s xml:id="echoid-s8390" xml:space="preserve">Hauksbejus in Appendice ad opus ſuum Expe-
              <lb/>
            rimentale adjecit aliquot notabilia obſervata in Exp. </s>
            <s xml:id="echoid-s8391" xml:space="preserve">19. </s>
            <s xml:id="echoid-s8392" xml:space="preserve">& </s>
            <s xml:id="echoid-s8393" xml:space="preserve">23, quæ
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            quoniam accurate ſatis inſtituta ſunt, digniſſima ſunt quæ recen-
              <lb/>
            ſeantur.</s>
            <s xml:id="echoid-s8394" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s8395" xml:space="preserve">Sumta ſunt duo ſpecula A B C D, A Z P K 20 pollices longa, quæ
              <lb/>
            ſibi ita imponebantur, ut ad unum latus A B ſe contingerent, & </s>
            <s xml:id="echoid-s8396" xml:space="preserve">ad
              <lb/>
            oppoſitam partem D C, K P a ſe diſtarent; </s>
            <s xml:id="echoid-s8397" xml:space="preserve">adeoque formabaut
              <lb/>
            duo plana, quæ angulum continebant D A K 20 minutorum:</s>
            <s xml:id="echoid-s8398" xml:space="preserve"/>
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