Heron <Alexandrinus>, Heronis Alexandrini spiritalium liber

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3731SPIRITAL. LIBER.
XVIII.
In quædam vaſa prius infuſo vino, quando aquam infun-
dimus, interdum quidem aqua pura, interdum vero pu-
rum vinum effluit:
conſtruitur autem hoc modo.
Sit vas A B C habens
24[Figure 24] duo diaphragmata D E
F G, &
per utraque ipſo-
rum impellatur tubus H
K, coarctatus diaphra-
gmatibus, &
perforatus fo-
ramine L paulo ſupra dia-
phragma F G ſub dia-
phragmate vero D E ſit
ſpiraculum M in ventre
vaſis.
His ita ſe habenti-
bus:
ſi quis comprehen-
dens effluxionem C infun-
dat vinum, procedet per
foramen L inlocum D E
F G:
aër enim, qui in
ipſo eſt per ſpiraculum M
recedet.
Quando igitur di-
gito obturemus ſpiraculum M, vinum in D E F G loco detinebitur.
Et
quando aquam infundamus in partem vaſis A B D E claudentes ſpiraculum
M pura fluet aqua.
Si vero dimittamus M ſpiraculum, cum adhuc in parte
ſuperiori ſit aqua, mixtum effluet:
& poſtea quam aqua effluxerit, tunc
purum effluet vinum:
licet etiam fæpius dimiſſo ſpiraculo M difterentes
effluxiones fieri:
ſed melius eſt prius infundentes aquam in locum D E
F G, ſpiraculumque comprehendentes vinum infundere:
continget
enim aliquando quidem purum effluere vinum;
dimiſlo autem ſpiraculo
mixtum:
& rurſus comprehenſo vinum purum effluere: idque toties
fiet, quoties ipſi voluerimus.

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