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xi 4

H eronis Spiritalia.

quousque poculum sursum impulsum,faciat aquam, quae est in collo, respira-tionem obstruere. Rursus enim in prio-rem locum restituetur, Sc non ampliusfluet 7r canalis: idque toties stet, quo-ties subtrahitur, & offertur poculum.Oportet autem non totum poculumsubtrahi, ne totum siphonis crus de-nudetur. Itaque canalis /u v conforme-tur in thyrsum, & pv circa ipsum Utspectaculum recte sit dispositum.

Constructio lagenae vociferantis,quando humidum efluat. Sit descri-pta lagena collum quidem obstructum-habens diaphragmate «/2, os vero dia-

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