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# Title: Optica Promota, Seu Abdita radiorum reflexorum & refractorum Mysteria, Geometrice Enucleata (shelfmark Leibn. Marg. 94)
# Folio 6, page id 727094130:0018
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=727094130&page=18
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# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 39 lines, status machine
# Lines: 39 recognised, mean confidence 0.91
# Machine transcription. Not an edition. Errors are expected: about 8% character error rate on Latin and French lines, higher on German.
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# After the first blank line: the recognised lines in reading order, one per line.

etionum menturis, aliquia commune haerebir: Porum airemre-
ectionum mylcerium, in sectionibus conicis larere compertum
elt; (uc deinceps parebie; Forte isitur e retractionum mensura il-
liclacebie. Secunco non fic regularis reflectio, nilisuperticies re-
moet in alhonspectionis Cic sectio conica; Forcossis erso nec regularis retractio,
nili retractionis superticies, sic sectio eriaM conica.
Si vero superficies reflectionis sic concavicas parabolae, et racii
incidenres ari paralleli, omnes reflectuntur in Locum: Ouaeritur
ergo num polsic diri suxerficies refractionis, ica ur omnesradii in
eam incidentes, speciali cuidam linex paralleli, retrinsancurin
unem aliquod
punctum deter-
MINAEUI ? ex
praedietis proba-
bile est (C calis de-
CUT) hanc superH.
ciem esse conicam
sectionem: Ut
autem eolem su
perticiem ana
logice inquira-
mus, ab exeremis
INCIPIATUE; _
concipiamus me-
cium in quod in-
cidune radii esse
densissium; Fa-
diiisitur refracti,
ad superticiem
redii perpendi-
cutares CrUHE.
Kepleras Ast.
Opt. f0. 1Y3
Eui lineam, in unum punctum concurrane? talis aurem est circu-
lus. Secundo concixiatur illud medium densiinuM, Per quod Crari-
Peune
Sacis Dallt ex Opricis elemenets, un operica, de Dioprri-
ca elle communis; Corlanisitur, e inrellectionum, e in retra-
Ouxritu eu sectio Conica, cujus ees perpendicutares ad