Weidler, Johann Friedrich, Jo. Friderici Weidleri Tractatus de machinis hydraulicis toto terrarum orbe maximis Marlyensi et Londinensi et aliis rarioribus similibus in quo mensurae prope ipsas machinas notatae describuntur, et de viribus earum luculenter disseritur

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          <pb o="69" file="0079" n="79" rhead="DE MACHINA HYDRAVL. LONDINENSI."/>
          <p>
            <s xml:id="echoid-s1556" xml:space="preserve">6. </s>
            <s xml:id="echoid-s1557" xml:space="preserve">Hinc probatu facile erit, quod emboli premen-
              <lb/>
            tes inuerſi, aſpirantibus multum praeſtent. </s>
            <s xml:id="echoid-s1558" xml:space="preserve">Quoad
              <lb/>
            deſcenſum enim ſimiles ſunt aſpirantium, et nihil am-
              <lb/>
            plius requiritur, quam,@ ut uincant attritum cylindri,
              <lb/>
            et ſurſum conuertant ualuulas coriaceas, quod modo
              <lb/>
            ante explicato obtinetur. </s>
            <s xml:id="echoid-s1559" xml:space="preserve">Quoad aſcenſum autem
              <lb/>
            quam maxime differunt. </s>
            <s xml:id="echoid-s1560" xml:space="preserve">Nam aquam ſupra ſe admiſ-
              <lb/>
            ſam, non pro ratione perpendiculi, in quo mouentur,
              <lb/>
            attollunt, ſed dum uis ſufficiat, per fiſtulas alias ad in-
              <lb/>
            ſignem amplius altitudinem ueluti eiaculantur. </s>
            <s xml:id="echoid-s1561" xml:space="preserve">Quod
              <lb/>
            ſi inſuper facultas motrix patiatur, poſſunt una ſub ſe
              <lb/>
            adducere embolos aſpirantes, quos cap. </s>
            <s xml:id="echoid-s1562" xml:space="preserve">2. </s>
            <s xml:id="echoid-s1563" xml:space="preserve">§. </s>
            <s xml:id="echoid-s1564" xml:space="preserve">4. </s>
            <s xml:id="echoid-s1565" xml:space="preserve">luculen-
              <lb/>
            tius deſcripſi, quo ipſo denuo augent altitudinem mo-
              <lb/>
            tus aquarum ex imo puteo eductarum. </s>
            <s xml:id="echoid-s1566" xml:space="preserve">et tum demum
              <lb/>
            foſſoribus ſalutaris eſt eiusmodi machina, qui quanto
              <lb/>
            profundius in terram penetrant, tanto maiorem aqua-
              <lb/>
            rum ſubterranearum copiam reperiunt.</s>
            <s xml:id="echoid-s1567" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1568" xml:space="preserve">7. </s>
            <s xml:id="echoid-s1569" xml:space="preserve">Vt igitur de proportione uirtutis neceſſariae
              <lb/>
            rectius iudicium feratur, ſequentia obſeruaſſe iuuaue-
              <lb/>
            rit. </s>
            <s xml:id="echoid-s1570" xml:space="preserve">Duplex nimirum uis mouens in hac machina
              <lb/>
            occurrit. </s>
            <s xml:id="echoid-s1571" xml:space="preserve">altera uaporis, ſiue exhalationum, pro em-
              <lb/>
            bolo in ſublime leuando, altera ponderis aerei, pro
              <lb/>
            eodem reducendo, et tollendo ſimul pondere, quod ex
              <lb/>
            extremo tigni h 2 pendet. </s>
            <s xml:id="echoid-s1572" xml:space="preserve">Exhalationum diſtentio
              <lb/>
            uincere debet, tum pondus emboli, tum tigni Q Q.
              <lb/>
            </s>
            <s xml:id="echoid-s1573" xml:space="preserve">non licuit mihi accura@e metiri brachia librilis h, h 2,
              <lb/>
            fi tamen picturae fides habenda eſt, digitis circiter
              <lb/>
            ſex externum h 2 longius eſt interno h, eſt itaque hoc
              <lb/>
            ponderoſius, et praeterea embolis et eorum longuriis
              <lb/>
            oneratum, uideturque exceſſus eius tantus eſſe, ut
              <lb/>
            emboli L grauitatem et attritum materiae, et partem
              <lb/>
            etiam aerei ponderis compenſet, hinc uapor reliquum
              <lb/>
            aeris niſuro ſuperare debet, cuius tamen aeſtimatio
              <lb/>
            uix melius, quam ex mirandis, quos ante </s>
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