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# Title: Optica Promota, Seu Abdita radiorum reflexorum & refractorum Mysteria, Geometrice Enucleata (shelfmark Leibn. Marg. 94)
# Folio 71, page id 727094130:0083
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=727094130&page=83
# Source image: https://digitale-sammlungen.gwlb.de/content/727094130/jpgs/default/00000083.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 38 lines, status machine
# Lines: 38 recognised, mean confidence 0.89
# Machine transcription. Not an edition. Errors are expected: about 8% character error rate on Latin and French lines, higher on German.
# Licence: CC BY 4.0, Leibniz Legible. Machine output: do not ingest it as verified text; keep this provenance with the text.
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# After the first blank line: the recognised lines in reading order, one per line.

rum interloctio in R; e intrianguloC TB, rectangulo ad T, c
dacis, OT, YB, dacus se BCi, ex ingulus BCM. Ec rurtus in eri-
angulo CB N, rectangulo ad NV, c dacis, BC, C. N, dabitur aneu-
tusBC N, a quo, angutus BO T ablacus, relinquit angulum RC
NI. Fcin criangulo R O N, C daris omnibus angulis, e larere
N; dacur larUS ET R: dantur ioitue in crianoulo isolceli BRC.
angulus B RC, e perpendicularis R T. Sir diameter vilualisO
P in eodem plano cum rectis N RB, MI R O, nihil videns perri-
mulam C. B, ulera exrremitaces eplindri OMN. Livex igitur N
RB, HI R C productae; diamerrum vilualem OP exacto compre-
hendune: ec in criangulo ilosceli OR P, (oporceC enim uc axis
Ocui, laminx AB C D Er perpendicularis) datis anguloOR P, e
Derpendiculari a vercice R in balem OP, seu diltanoia oculi a puris
Ao R; dabitur d bals O D, diameren visualis quaesica; quam ob-
Tervare oportuie.
Scholium.
Foramen aurem urea, non est sempor ejuldem quancicaris; sod.
in Forei luce diminuicur, in debili aurem ampliscu.
Prop. 49. Theorema.
Racri paralleli, non debilicati; in omni distantia, aequaliter illastrane.
e
idem objectum, eodem modo positum.
Tnc radii paralleti AM N L, quorum
’exTremISunE AL, WN, ilultrances
idem objectum B, C, eodem modo poli
cum, sed in divertis dictanciis; a radio-
rum Fonte. DicoBC, aequalicer semper
illustrari. Ouonium enim extremi radii,
equibus lunE AL, MN, excremicates
superticici, objecti B C illustrances, incex
sc aequidictant, idem igitur objectum, co-
dem modopoluum, semper intercipiune:
omnes igicur radii, incer exrremos; ob
jectum B C, incercixienes, in objectum
BC cemper incidunt; iidem isicur radii
eandem dane illustrationem; Cola enim
distancia, ractrorum rim non debilirat.
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