Gravesande, Willem Jacob 's, Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1
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            <s xml:id="echoid-s9542" xml:space="preserve">
              <pb o="260" file="0358" n="392" rhead="PHYSICES ELEMENTA"/>
            cum; </s>
            <s xml:id="echoid-s9543" xml:space="preserve">ipſius cavitas eſt cylindrica, bene lævigata, diametrum-
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            que habet quatuor pollicum.</s>
            <s xml:id="echoid-s9544" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s9545" xml:space="preserve">Probe firmatur tubus, & </s>
            <s xml:id="echoid-s9546" xml:space="preserve">aquæ effluxus, inter hunc & </s>
            <s xml:id="echoid-s9547" xml:space="preserve">li-
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            gnum, interpoſitis lini filamentis, cohibetur.</s>
            <s xml:id="echoid-s9548" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s9549" xml:space="preserve">Et tubi anguſtiores ſæpe adhibentur, in quo caſu annu-
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            lis ligneis extremitates circumdantur, ut eodem modo fir-
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            mentur in foraminibus memoratis.</s>
            <s xml:id="echoid-s9550" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s9551" xml:space="preserve">In inferiori parte Parallelopipedi F epiſtomia dantur qua-
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            tuor I, L, M, N. </s>
            <s xml:id="echoid-s9552" xml:space="preserve">Horum aperturæ in laminis dantur
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            horizontalibus, quæ omnes in eodem poſitæ ſunt plano ho-
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            rizontali; </s>
            <s xml:id="echoid-s9553" xml:space="preserve">ſuntque hæ aperturæ ipſis epiſtomiorum capaci-
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            tatibus multo minores, ut aqua ſine ſenſibili attritu effluat.
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            </s>
            <s xml:id="echoid-s9554" xml:space="preserve">Minorum duorum epiſtomiorum, quæ æqualia ſunt, aper-
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            turæ æquales ſunt, alîus dupla eſt, & </s>
            <s xml:id="echoid-s9555" xml:space="preserve">maximi tripla. </s>
            <s xml:id="echoid-s9556" xml:space="preserve">Dia-
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            meter aperturæ mediæ ſemi poll. </s>
            <s xml:id="echoid-s9557" xml:space="preserve">æqualis eſt.</s>
            <s xml:id="echoid-s9558" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s9559" xml:space="preserve">Quantumvis exacte hæ menſurentur aperturæ, non o-
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            mnis error vitari poteſt, qui quomodo corrigatur, ſtatim di-
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            cam.</s>
            <s xml:id="echoid-s9560" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s9561" xml:space="preserve">Oris arcæ AB in medio imponitur tabula P, cujus lon-
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            gitudo arcæ latitudinem paululum excedit & </s>
            <s xml:id="echoid-s9562" xml:space="preserve">cujus latitu-
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            do ſedecim aut octodecim eſt poll. </s>
            <s xml:id="echoid-s9563" xml:space="preserve">Hæc, ne impoſita
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            caſu in aquam cadat, oris, ſemipollicem altis, circumdatur.
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            </s>
            <s xml:id="echoid-s9564" xml:space="preserve">Firmatur tabula regulis ligneis quatuor, quarum duæ viden-
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            tur in o & </s>
            <s xml:id="echoid-s9565" xml:space="preserve">q, cum ipſa cohærentibus, & </s>
            <s xml:id="echoid-s9566" xml:space="preserve">inter quas promi-
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            nentia lignea r, cum arca cohærens, recipitur.</s>
            <s xml:id="echoid-s9567" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s9568" xml:space="preserve">Tabulæ huic ſuperimponitur crux lignea S, infra tabu-
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            lam penetrans, ut cochleâ firmetur. </s>
            <s xml:id="echoid-s9569" xml:space="preserve">Cruci appenditur bi-
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            lanx V, quâ in aliis experimentis utimur, & </s>
            <s xml:id="echoid-s9570" xml:space="preserve">de qua antea
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            egimus .</s>
            <s xml:id="echoid-s9571" xml:space="preserve"/>
          </p>
          <note symbol="*" position="left" xml:space="preserve">703</note>
          <p>
            <s xml:id="echoid-s9572" xml:space="preserve">Ita ſuſpenditur hæc, ut, quando eſt in æquilibrio, lan-
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            cium pedes ſupra tabulam ad altitudinem, quæ paululum
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            excedit quartam partem pollicis, tantum eleventur.</s>
            <s xml:id="echoid-s9573" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s9574" xml:space="preserve">Uncus autem lancis k reſpondet foramini in tabula, quod
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            diametrum habet trium partium quartarum pollicis, & </s>
            <s xml:id="echoid-s9575" xml:space="preserve">cu-
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            jus centrum datur in axe continuato tubi T.</s>
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