Heron <Alexandrinus>, Heronis Alexandrini spiritalium liber

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4034HERONIS
XXI
In ſpondea, hoc eſt in vaſa ſacrificii injecto quinque
drachmarum numiſmate, aqua ad inſpergendum effluit.
Sit ſpondeum, ſive theſaurus
27[Figure 27] A B C D, cujus ofculum A ſit
detectum:
& in theſauro ſit vas
F G H K habens aquam, &

pyxidem L, ex qua canalis L M
extra feratur:
vaſi autem appo-
natur regula recta NX, circa
quam alia regula aptetur O P,
habens ad O platyſmation R pa-
rallelum fundo vaſis:
& juxta
P ad S habens operculum pyxidi
L congruens, ita ut aqua per
canalem L M non fluat:
ſit au-
tem pyxidis operculum gravius
platyſmatio R:
& utriſque vi-
delicet numiſmate, &
platy-
ſmatio ipſo levius.
Cum igitur
per oſculum A numiſma injicia-
tur, incidet in platyſmation R:
& deprimens regulam O P incli-
nabit, extollet autem pyxidis
operculum, ita ut aqua fluat:
poſtea excidente numiſmate rurſus oper-
culum pyxidem obſtruet, ut non amplius fluat aqua.

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