Heron <Alexandrinus>
,
Heronis Alexandrini spiritalium liber
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HERONIS
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<
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xml:space
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">Ex jam demonſtratis perſpicuum eſt ſiphonis fluxum, eo
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immobili permanente inæqualem fieri, idem enim contin-
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git & </
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<
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<
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<
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fluxus inæqualis eſt, propterea quod in principio quidem
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aquæ effuſio majori gravitate premitur, poſt vero ea evacuata
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minori: </
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<
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xml:space
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<
s
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xml:space
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">quo ſiphonis exceſſus major eſt, eo celerior fluxus
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efficitur: </
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>
<
s
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xml:space
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">rurſus enim fluxus, qui fit per oſculum ipſius, ma-
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jori gravitate urgetur, quàm cum minor ſit exterior exceſſus,
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quo videlicet ſuperficies aquæ in vaſe exiſtentis exterius ſi-
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phonis oſculum excedit: </
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>
<
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xml:space
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inæqualis jam dictus eſt: </
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qualem per ſiphonem invenire.</
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">De fluxu ſemper æquali per ſiphonem inflexum. III.</
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">Sit aliquod A B vas aqua plenum in quo ſupernater C D lebetarium,
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habens os obtectum operculo C D, per operculum vero, & </
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<
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tarii trajiciatur ſiphonis alterum crus, & </
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">ſtanno ad foramina coarctetur:
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</
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">alterum autem crus ſit extra vas A B: </
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xml:space
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">habeatque oſculum humilius, quam
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ſit aquæ in vaſe exiſtentis ſuperficies. </
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<
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xml:space
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">Si igitur per ſiphonis oſculum
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exterius aërem, qui eſt in ſiphone attrahemus, ſimul conſequetur
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& </
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in ſiphone locus omnino vacuus
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eſſe: </
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<
s
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">cum principium fluxus
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acceperit ſiphon, eo uſque fluet,
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quoad totam, quæ in vafe con-
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tinetur, aquam exhauſerit: </
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autem is fluxus æqualis, præte-
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rea quod exceſſus ſiphonis ex-
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tra, quo in partem inferiorem
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excedit ſuperficiem aquæ ſemper
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idem manet; </
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<
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exinanitione ſimul & </
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ſiphone deſcendit: </
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<
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">quo autem
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exceſſus extra major ſit, eo ve-
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locior erit fluxus, quamquam
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per ſeipſum æqualis. </
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ſiphon E F G, aquæ autem
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ſuperficies ad rectam lineam
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H K.</
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