Schott, Gaspar - Mechanica hydraulico-pneumatica. Pars I. Mechanicae Hydraulico-pnevmaticae Theoriam continet.

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§ V.

Heronis error in elevando oleo vi Expulſivâ
in lucerna.

HEro Alexandrinus in libello de Spiritalibus cap. 72. proponit
hanc Machinam. Lucernæ conſtructio, vt ellychnio impo
ſito, quando oleum deficiat, ex aure eius oleum in ellychnium infun
datur, quantum quis voluerit, nullo ipſi appoſito vaſe, ex quo oleum in

fluat. Qua quidem in conſtructione errorem committit graviſ
ſimum (ſi tamen ipſius eſt error, & non potiùs Interpretis, qui
figuras appoſuit) quem hîc detegere oportet, ne alijs etiam ſit

errandi occaſio. Quod eò et
iam libentiùs facio, quòd nec
Federicus Commandinus, qui
ex Græco in latinum tranſtulit
Heronem; nec Ioannes Bapti
ſta Aleottus, qui Commandini
interpretationem red didit Itali
cam; nec Ioannes Baptiſta Porta,
qui Heronis errorem etiam ob
ſervavit, genuinam lucernæ de
lineationem dederunt. Eam
verò hîc dare conabimur, allatis

Heronis verbis ex Commandini
translatione, addendo nonnulla
verba majoris claritatis gratia,
quæ aſteriſcis in margine no
tantur. Sic ergo diſcurrit Hero.
Conſtruatur lucerna, baſim habens
concavam, & triangularem inſtar
pyramidis; ſit que baſis concava AB
CD, & in ea diaphragma EF. Lu
cernæ autem caulis ſit GH, & ipſe
concavus; ſupra quem ſit concavus
calathus KL, plurimum olei conti
nens. Ex diaphragmate EF pro-

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