Heron <Alexandrinus>, Heronis Alexandrini spiritalium liber

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2115SPIRITAL. LIBER.
De fluxu partim æquali partim inæqualiper ſiphonem. IV.
At ſluxus partim quidem æqualis, partim vero inæqualis
fit per ſiphonem:
voco autem partim æqualem, & partim
inæqualem, quando per aliquod tempus volentibus nobis
æqualis ſit factus à principio fluxus, &
rurſus per aliud tem-
pus ſi ita nobis placeat, æqualis ſit per ſe ipſum, priori vero
vel tardior, vel velocior.
Sit enim rurſus aquæ vas
8[Figure 8] A B, lebes C D, per oper-
culum vero, &
fundum le-
betis trajiciatur canalis la-
tior, quam crus interius ſi-
phonis:
& ſit hic canalis
M L, coarctatus &
opercu-
lo, &
fundo lebetis: oper-
culo autem inſiſtat pegma-
tium ex regulis compactum,
quemadmodum littera ◠,
&
ſit CNXD. In regulis
autem rectis C N, X D ex
interiori parte ſecundum
earum longitudinem inſcul-
pantur canales, in quibus
altera regula O P expedite
percurrat:
ſit etiam co-
chlea R S recta pertingens
ad operculum C D, &
per
foramen, quod eſt in regula O P tranſiens:
ſit præterea tylus aliquis regula
O P conjunctus, ita ut inſeratur in helicem cochleæ, excedat autem co-
chlea ſupra regulam N X, &
exceſſui adnectatur anſa, per quam cochleam
convertamus, ita ut regula O P interdum quidem ſublimis fiat, interdum
vero depreſſa:
cui regulæ conjunctum ſit crus interius ſiphonis, permeans
etiam per canalem L M, adeo ut oſculum ipſius aqua, quæ in vaſe demer-
gatur.
Si igitur rurſus per oſculum exterius humidum attrahamus, fluet
ſiphon æqualiter, quouſque totum, quod eſt in vaſe, humidum exhauria-
@ur.
Quando autem volumus per ipſum alterum fieri fluxum,

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