Heron <Alexandrinus>, Heronis Alexandrini spiritalium liber
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            ſyringulam Mvocem emittet. </s>
            <s xml:id="echoid-s1615" xml:space="preserve">Sit etiam in diaphragmate A B aliud fora-
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            men, per quod, lagena in rectum conſtituta, aër retrocedat.</s>
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        <div xml:id="echoid-div114" type="section" level="1" n="72">
          <head xml:id="echoid-head78" xml:space="preserve">LXIV.</head>
          <p>
            <s xml:id="echoid-s1617" xml:space="preserve">Si in aliqua baſi exiſtat vas, vinum habens, & </s>
            <s xml:id="echoid-s1618" xml:space="preserve">canalem
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            apertum, deducto pondere facere, utcanalisad menſuram
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            fluat, verbi gratia interdum quidem ſemicotylium, interdum
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            vero cotylium, & </s>
            <s xml:id="echoid-s1619" xml:space="preserve">generaliter quantum quis voluerit.</s>
            <s xml:id="echoid-s1620" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1621" xml:space="preserve">Sit vas A B, in
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            quod vinum infun-
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            datur. </s>
            <s xml:id="echoid-s1622" xml:space="preserve">Canalis au-
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            tem in ipſo juxta
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            fundum ſit D. </s>
            <s xml:id="echoid-s1623" xml:space="preserve">Et
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            obſtruatur collum
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            diaphragmate E F:
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            </s>
            <s xml:id="echoid-s1624" xml:space="preserve">perque E F im-
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            peliatur GH tubus,
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            à fundo vaſis tan-
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            tum diſtans, quan-
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            tum ad aquæ flu-
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            xum ſatis ſit. </s>
            <s xml:id="echoid-s1625" xml:space="preserve">Baſis
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            autem vaſi ſubjecta
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            ſit K L M N. </s>
            <s xml:id="echoid-s1626" xml:space="preserve">Et
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            alter tubus X O pa-
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            rum diſtans à dia-
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            phragmate, & </s>
            <s xml:id="echoid-s1627" xml:space="preserve">per
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            baſim procedens. </s>
            <s xml:id="echoid-s1628" xml:space="preserve">
              <lb/>
            Sit præterea in baſi
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            aqua obſtruens oſ-
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            culum tubi X O: </s>
            <s xml:id="echoid-s1629" xml:space="preserve">
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            & </s>
            <s xml:id="echoid-s1630" xml:space="preserve">ſit regula P R,
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            cujus dimidium
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            quidem ſit intra ba-
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            ſim, dimidium ve-
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            ro extra. </s>
            <s xml:id="echoid-s1631" xml:space="preserve">Et moveatur circa punctum S, ſuſpendatur autem in extremo
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            regulæ P clepſydra, quæ foramen T in fundo habeat. </s>
            <s xml:id="echoid-s1632" xml:space="preserve">Itaque vas </s>
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