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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        <div xml:id="echoid-div176" type="section" level="1" n="176">
          <p>
            <s xml:id="echoid-s6526" xml:space="preserve">
              <pb o="275" file="0289" n="289" rhead="PRÆFATIO."/>
            cundum tutiſſimam optimamque Regulam a Nieuwentytio in Phy-
              <lb/>
            ſicis ſtabilitam. </s>
            <s xml:id="echoid-s6527" xml:space="preserve">Quamvis vero hic quædam præſtiterim, non ta-
              <lb/>
            men omnia abſolvere potui, quæ deſideraveram; </s>
            <s xml:id="echoid-s6528" xml:space="preserve">nam adeo ferti-
              <lb/>
            lis eſt Natura, ut ne quidem res abjectiſſima exhauriri penitus poſ-
              <lb/>
            ſit, ejuſve perfecta cognitio acquiri.</s>
            <s xml:id="echoid-s6529" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6530" xml:space="preserve">Diviſi hoc Thema in 8 Capita, quorum</s>
          </p>
          <p>
            <s xml:id="echoid-s6531" xml:space="preserve">1. </s>
            <s xml:id="echoid-s6532" xml:space="preserve">Agit de Adſcenfu Aquæ in tubos rectos æqualium diametro-
              <lb/>
            rum, ſed diveræ longitudinis.</s>
            <s xml:id="echoid-s6533" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6534" xml:space="preserve">2. </s>
            <s xml:id="echoid-s6535" xml:space="preserve">De Adſcenſu in tubos ejuſdem longitudinis, ſed diverſæ dia-
              <lb/>
            metri.</s>
            <s xml:id="echoid-s6536" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6537" xml:space="preserve">3. </s>
            <s xml:id="echoid-s6538" xml:space="preserve">De Adſcenſu variorum Fluidorum in eundem tubum.</s>
            <s xml:id="echoid-s6539" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6540" xml:space="preserve">4. </s>
            <s xml:id="echoid-s6541" xml:space="preserve">Complectitur Experimenta cum tubis rectis, ſed inæqualis
              <lb/>
            capacitatis ad utrumque extremum.</s>
            <s xml:id="echoid-s6542" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6543" xml:space="preserve">5. </s>
            <s xml:id="echoid-s6544" xml:space="preserve">Agit de Tubis æqualis ubique diametri, ſed vario modo in-
              <lb/>
            flexis.</s>
            <s xml:id="echoid-s6545" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6546" xml:space="preserve">6. </s>
            <s xml:id="echoid-s6547" xml:space="preserve">De Tubis inæqualis diametri & </s>
            <s xml:id="echoid-s6548" xml:space="preserve">vario modo inflexis.</s>
            <s xml:id="echoid-s6549" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6550" xml:space="preserve">7. </s>
            <s xml:id="echoid-s6551" xml:space="preserve">De Tubis in recipiente aëre vacuo concluſis.</s>
            <s xml:id="echoid-s6552" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6553" xml:space="preserve">8. </s>
            <s xml:id="echoid-s6554" xml:space="preserve">De adſcenſu liquorum in tubos ſibi mutuo immiſſos.</s>
            <s xml:id="echoid-s6555" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6556" xml:space="preserve">D
              <emph style="sc">EFINITIO.</emph>
            </s>
            <s xml:id="echoid-s6557" xml:space="preserve">Per tubum capillarem vitreum intelligo, canalem
              <lb/>
            vitreum, cavum, cylindricum, cujus cavitas adeo anguſta, ut dia-
              <lb/>
            meter ſit minor {1/10} parte pollicis.</s>
            <s xml:id="echoid-s6558" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6559" xml:space="preserve">Monitum. </s>
            <s xml:id="echoid-s6560" xml:space="preserve">Omnia, quæ hic deſcribuntur, Experimenta, capta
              <lb/>
            ſunt cum tubis. </s>
            <s xml:id="echoid-s6561" xml:space="preserve">ex vitro albo, puro, in Hollandia confecto, re-
              <lb/>
            centiſſime conflatis, & </s>
            <s xml:id="echoid-s6562" xml:space="preserve">ſæpe modo elapſis paucis minutis aut horis:
              <lb/>
            </s>
            <s xml:id="echoid-s6563" xml:space="preserve">quæ ideo moneo, quoniam brevi tempore cruſta quædam adnaſci-
              <lb/>
            tur ſuperficiei internæ tuborum, inſtar vitrioli vel ferruginis ad-
              <lb/>
            creſcentis metallis, quæ impedit, quominus accuratæ obſervatio-
              <lb/>
            nes inſtitui poſſint, imo quæ ſæpe omnem effectum plane tol-
              <lb/>
            lit, ut nequicquam liquoris tubos ingrediatur; </s>
            <s xml:id="echoid-s6564" xml:space="preserve">neque hoc præcave-
              <lb/>
            ri poteſt etiamſi capſulis probe incluſi tubi conſerventur; </s>
            <s xml:id="echoid-s6565" xml:space="preserve">nemo
              <lb/>
            igitur hæc tentamina repetat, niſi ipſe artem tubos componendi no-
              <lb/>
            rit, vel præſentem habeat artificem, atque eos, modo factos, in
              <lb/>
            uſum vocaverit, cæteroquin diverſiſſimos a noſtris obſervabit, ſed
              <lb/>
            erroneos, effectus: </s>
            <s xml:id="echoid-s6566" xml:space="preserve">in iis vero conſtruendis arcanum non latet, quod
              <lb/>
            tamen primâ fronte ſubeſle videretur, cum tuborum exiliſſimorum,
              <lb/>
            quorum craſſities vix capillum humanum ſuperat, mentio fit; </s>
            <s xml:id="echoid-s6567" xml:space="preserve"/>
          </p>
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