Heron <Alexandrinus>, Heronis Alexandrini spiritalium liber

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9488HERONIS
LXXI.
Si in ara aliqua accendatur ignis, animalia choreas ducere
videbuntur, etenim aræ perſpicuæ erunt, ſive vitreæ ſive
corneæ.
78[Figure 78]
Per epipyrum demittitur tubus ad baſim aræ, qui in cnodace verſa-
tur, &
à ſuperiori parte in fiſtula, quæ epipyro conjuncta ſit. Habeat
autem tubus etiam alios tubulos inflexos, ſimulque perforatos, &
ipſi
conjunctos, qui inter ſeſe ſecundum diametrum diſponantur, atque in-
flexiones viciſſim teneant.
Habeat præterea tympanum ſibi annexum,
cui animalia choreas ducentia imponuntur.
Itaque igne accenſo calefactus
aër per fiſtulam in tubum procedit:
ex tubo autem per inflexos tubulos
expulſus, &
aræ alveo inhærens convertit tubum & animalia quæ choreas
ducunt.

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