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-s6985" xml:space="preserve">Præparavi alium tubum graciliſſimum 6 longum pedes, in quem
              <lb/>
            ad altitudinem 6 pollicum Aqua velociſſime ingreſſa fuit, elapſa
              <lb/>
            horâ ad 18 pollices pervenerat, verum poſt 24 horas modo ad
              <lb/>
            quietem reducta fuit, altitudinem 22 pollicum nacta: </s>
            <s xml:id="echoid-s6986" xml:space="preserve">ejuſmodi etiam
              <lb/>
            Experimentum, in quo Aqua ad altitudinem 21 pollic. </s>
            <s xml:id="echoid-s6987" xml:space="preserve">adſcendit,
              <lb/>
            commemorat Hooke in Microgr. </s>
            <s xml:id="echoid-s6988" xml:space="preserve">Obſ. </s>
            <s xml:id="echoid-s6989" xml:space="preserve">6.</s>
            <s xml:id="echoid-s6990" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6991" xml:space="preserve">Difficillimum eſt tubos longiſſimos & </s>
            <s xml:id="echoid-s6992" xml:space="preserve">graciliſſimos componere,
              <lb/>
            ideo nihil ulterius præſtare hic potui; </s>
            <s xml:id="echoid-s6993" xml:space="preserve">cum tamen tubi in immen-
              <lb/>
            fum ſubtiliores â natura fieri poſſint, quales illa molitur in vegeta-
              <lb/>
            bilibus, qui ad majorem altitudinem, non pollices, ſed centenos
              <lb/>
            pedes æquantem, Aquam abripiunt, ecquis terminos adſcendentis
              <lb/>
            Aquæ definiet?</s>
            <s xml:id="echoid-s6994" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6995" xml:space="preserve">Antequam hoc Caput claudam, aliquid etiam dicendum eſt de
              <lb/>
            figura ſuperficiei ſuperioris Aquæ in tubis, hæc cava eſt, altior ad
              <lb/>
            parietes, humilior in medio, ſimilis illi, quam Aqua ſcyphis vi-
              <lb/>
            treis infuſa habet, inferior ſuperficies, tubo perpendiculariter in
              <lb/>
            aëre ſuſpenſo, per Microſcopium apparet plana, & </s>
            <s xml:id="echoid-s6996" xml:space="preserve">in eodem cum
              <lb/>
            oris tubi horizontali plano; </s>
            <s xml:id="echoid-s6997" xml:space="preserve">ſi autem nimis Aquæ in tubo fuerit,
              <lb/>
            quam quæ contineri poſſit, hæc effluens ſuâ gravitate format ſphæ-
              <lb/>
            ram perfectam, pendentem ab extremitate tubi: </s>
            <s xml:id="echoid-s6998" xml:space="preserve">figura concava eſt
              <lb/>
            eadem, quam vitrum planum Aquæ immiſſum pro dimidia parte
              <lb/>
            format, de hac autem in Diſſertatione ſequenti.</s>
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