Heron <Alexandrinus> - Heronis Alexandrini spiritalium liber

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10296HERONIS

LXXV.

Hydraulici inſtrumenti conſtructio.

84[Figure 84]

Sit quædam arula ænea A B C D, in qua ſit aqua, & in aqua conca-
vum hemiſphærium inverſum, quod furnus appellatur E F G H, ha-
bens in humido defluxum, ad partes, quæ in fundo ſunt. A vertice autem
ipſius duo producantur tubi ſimul cum eo perforati, qui ſunt circa aru-
lam, quorum unus G K L M in exteriorem arulæ partem incurvetur,
ſimul perforatas cum modiolo N X O P habente os infra, & interiorem
ſuperficiem rectam ad embolum. Huic autem embolus R S apteturita,
ut aeringredi non poſſit. Atque embolo jungatur regula TY valde fir-
ma, ad quam aptetur alia regula Y Φ, mota circa clavum in Y, & cir-
cumacta ad rectam regulam ΨQ firmiter ſtabilitam. At modiolo NXOP
imponatur ad fundum alter modiolus parvus Ω ſimul cum ipſo perforatus,
& coopertus ex parte ſuperiori, habensque foramen, per quod aër in
modiolum ingrediatur. Sub foramine autem ſit laminula ipſum

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