Heron <Alexandrinus> - Heronis Alexandrini spiritalium liber

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9589SPIRITAL. LIBER.

LXXII.

Lucernæ conſtructio ut ellychnio impoſito, quando
oleum deficiat, ex aure ejus oleum in ellychnium infunda-
tur, quantum quis voluerit, nullo ipſi appoſito vaſe, ex
quo oleum influat.

Conſtruatur lucerna baſim ha-

79[Figure 79] bens concavam, & triangularem in-
ftar pyramidis. Sitque baſis concava
A B C D, & in ea diaphrag ma E F.
Lucernæ autem caulis ſit G H & ipſe
concavus, ſupra quem ſit concavus
calathus K L plurimum olei conti-
nens: & ex diaphragmate E F proce-
det M N tubus, ſimul cum eo perfo-
ratus, tantum diſtans à calathi oper-
culo K L, in quo & elly chniumim-
ponitur, quantum ad aëris exitum
ſufficiat. Alius autem tubulus X O,
demittatur per operculum K L, di-
ſtans à fundo calathi, quantum ſatis
ſit ad aquæ fluxum, & ex operculo
paululum excedens. Exceſſui vero
aptetur alius tubulus P, habens ſu-
perius oſculum obſtructum qui per
fundum lychnii impulſus coaginen-
tetur lychno, ad tubum autem P ag-
glutinetur alius tubulus exilis pro-
cedens ad extremitatem auris, & ſi-
mul cum ea perforetur, ut influat in concavitatem elly chnii, foramen ha-
bens quemadmodum & alii. Et ſub diaphragmate E F conglutinetur cla-
vicula deferens in locum CDEF, ita ut ſi aperiatur, aqua ex loco ABEF
in ipſum CDEF tranſeat. Sit autem in operculo A B parvum foramen,
per quod locum A B E F implebimus aqua, & qui in ipſo eſt aër per

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