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# Title: Optica Promota, Seu Abdita radiorum reflexorum & refractorum Mysteria, Geometrice Enucleata (shelfmark Leibn. Marg. 94)
# Folio 35, page id 727094130:0047
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=727094130&page=47
# Source image: https://digitale-sammlungen.gwlb.de/content/727094130/jpgs/default/00000047.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 15 lines, status machine
# Lines: 15 recognised, mean confidence 0.85
# 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.
# Wording rule: say "the machine reads it as …", never "Leibniz wrote".
# After the first blank line: the recognised lines in reading order, one per line.

(357
radios ad focum a convergences, in superticio speculi L. MI R re-
Recti, e in focum B, congresari; sic enim radius P L. ad Focun
a vergens, qui igicur est in eodem plano cum axe speculi; hyper-
bole isitur L. ML R (ex cujus revolurione genitum est speculum) 10. Bujusi
est superticies refectionis racii P L; qui racius produearur in A,
Sc a puncto L ducatur recta L B; tangarque Eyperbolam, recta
HLC, in puncto L; angulus igicur A L G, hoc eAt HL P, est
aequalis anculo CL B; retlecticur igitur P L in B: quod erac olten-
dendum. Lodem quoque modo, demonttratur haec conclusio, in
Execulo hyperbolico concavO.
DiperiC
viae ebitt Bd Fobit i ECtB
tedus l a pltetu
congre