Heron <Alexandrinus> - Heronis Alexandrini spiritalium liber

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7367SPIRITAL. LIBER.

LI.

Si crater in quadam baſe exiſtat, habeatque canalem a-
pertum inter fluendnn ceflabit, quamquam congruens o-
perculum canalem non claudat.

58[Figure 58]

Sit crater A B in baſi C. Perque fundum vaſis & baſim tubus impellatur
D E F in canalem deſinens. In auricula autem crateris regula G H com-
pact a inſiſtat, ad quam aptetur altera regula K L circa H fibulam: & ab
extremitate K alia regula demittatur K M, quæ circa fibulam K movea-
tur. Ad M vero contineat pyxidem, quæ pondus habeat, poſſitque tu-
bum D E F circumſepire. Quando igitur cratere pleno exiſtente, depri-
memus extremitatem regulæ L pyxis NX extolletur, & quæ in cratere
eſt aqua per tubum DEF feretur extra. Quod ſi extremitatem L dimit-
temus pyxis deſcendet, tubumque DEF circumſepiet: & qui in ipſa eſt
aer non habens egreſſum, obſtabit humori exiſtenti circa tubum DEF,
ut non amplius per oſculum D feratur. Sed cum rurſus deprimemus extre-
mitatem L, canalis aquam effundet.

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