Heron <Alexandrinus>, Heronis Alexandrini spiritalium liber

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              <pb o="53" file="0059" n="59" rhead="SPIRITAL. LIBER."/>
              <figure xlink:label="fig-0059-01" xlink:href="fig-0059-01a" number="44">
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            coactæ per trochleam religentur ad pondus plumbeum, per quod deſcen-
              <lb/>
            dens valvæ claudentur. </s>
            <s xml:id="echoid-s1141" xml:space="preserve">Siphon autem K L M habeat exterius crus in vas
              <lb/>
            ſuſpenſum deferens: </s>
            <s xml:id="echoid-s1142" xml:space="preserve">& </s>
            <s xml:id="echoid-s1143" xml:space="preserve">per quoddam foramen P aqua in ſphæram infun-
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            datur, adeo ut ad dimidium perveniat, quod quidem foramen poſt in-
              <lb/>
            fuſionem obturetur. </s>
            <s xml:id="echoid-s1144" xml:space="preserve">Continget igitur igne evaporante aërem, qui eſt in
              <lb/>
            arula calefactum in ampliorem locum fundi. </s>
            <s xml:id="echoid-s1145" xml:space="preserve">Hic autem per tubum F G
              <lb/>
            in ſphæram procedens, humorem, qui in ea continetur per ſiphonem
              <lb/>
            KLM in ſuſpenſum vas extrudet. </s>
            <s xml:id="echoid-s1146" xml:space="preserve">Quod vas deſcendens attrahet catenu-
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            las, & </s>
            <s xml:id="echoid-s1147" xml:space="preserve">valvas aperiet. </s>
            <s xml:id="echoid-s1148" xml:space="preserve">Rurſus extincto igne aër quidem attenuatus exce-
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            det per raritates parietis ſphæræ. </s>
            <s xml:id="echoid-s1149" xml:space="preserve">Inflexus autem ſiphon K L M humo-
              <lb/>
            rem ex vaſe ſuſpenſo attrahet, ita ut repleatur locus excretarum raritatum.
              <lb/>
            </s>
            <s xml:id="echoid-s1150" xml:space="preserve">Erit enim ipſius extremitas immerſa in aqua, quæ in vaſe ſuſpenſo contine-
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            tur. </s>
            <s xml:id="echoid-s1151" xml:space="preserve">Exinanito autem vaſe, & </s>
            <s xml:id="echoid-s1152" xml:space="preserve">obid leviori facto, rurſus pondus ſuſpen-
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            ſum deorſum repens valvas occludet. </s>
            <s xml:id="echoid-s1153" xml:space="preserve">Sunt qui pro aqua utuntur hydrar-
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            gyro, quoniam & </s>
            <s xml:id="echoid-s1154" xml:space="preserve">aqua gravius eſt, & </s>
            <s xml:id="echoid-s1155" xml:space="preserve">à caliditate facile ſolvitur.</s>
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