Heron <Alexandrinus>, Heronis Alexandrini spiritalium liber

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108102JO. BAPT. ALEOTTI
S It baſis A B C D, cujus una pars C D E F G H K ſit arctiffi-
me
clauſa:
ita ut aër inde exire nequeat. Supra hanc & ſubter
canalem
S ponatur infundibulum T, cujus cauda ſub finem
coarctata
, ut demonſtrat pars ejus notata V, in tantum diſtet
ſupra
fundum baſis G H K, quantum ad fluxum aquæ videbitur ſufficere:
cujus fundo ſint applumbati duo inflexi ſiphones X & Y; ſed Y fit multo
ſubtilior
ſiphone X, hinc in P ſtatuatur Hercules, in N poma aurea &

ſub
eis in L Draco.
Hoc facto in latere baſis E F G H adaptetur tubus
M
, qui in O flectatur &
pertingat in os Draconis ita comparatum, ut edat
ſibilum
, dum aër (ab aqua canalis S, quæ per infundibulum in baſin intrat)
pulſus
conabitur (cum alium exitum non inveniat) exire periſtum tubum:

&
ſit quoque ita adaptatum, ut dum per ſiphonem Y evacuatur baſis,
neque
poteſt aliunde, quam per oſculum dicti tubi admittere aërem,
etiam
ex eo majorem ſibilum edat;
quod nemini puto conſtructu difficile
eſſe
.
Poſtea à clavo O O ſuſtentetur regula D D C C ſub cujus una
extremitate
C C adaptetur conus cavus R R qui interius contineat cir-
culos
perfectos, lineasque rectiſſimas, accuratiſſimè torno elaboratus.

Intraque
illum adaptetur conus ſolidus B B, qui illi exactè ab omni parte
inſiſtat
:
hic in parte ſuperiore habeat annulum, cui alligatus funis ſuſpen-
datur
in C C, regula D D C C ſtante in perfecto diano.
Et ſub D D
appendatur
vas Z, quod cavum multo levius ſit cono B B:
hic vero &
regula
&
conus ita ſint diſpoſiti, ut vas Z ſit ſub crure exteriore inflexi ſi-
phonis
X, &
ad anſam ejus alligetur funis, qui tranſeat per crus Hercu-
lis
dextrum, perque corpus ejus attingat brachia, quæ clave quadam
figura
literæ T in æquilibrio ſuſtententur:
exemplar eſt T. 3. eſt humerus
dexter
, 2.
eſt humerus ſiniſter, & 4. eſt ſcytala, dum itaque 2. 3. ſtant
in
æquilibrio, alligetur funis in 4 extremitate ſcytalæ.
Poſtea manibus
Herculis
inſeratur clava Q.
Deinde ſupponatur cruri inflexi ſiphonis Y
vas
A A, &
hic tubus ſit operculo dicti vaſis optime applumbatus, &
operculum
ipſum vaſi:
ex quo egrediatur tubulus T T R qui caput ſuum
inſeratin
cavum conum R R, iſque cum iſto ſit perforatus, &
habeat

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