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# Title: Optica Promota, Seu Abdita radiorum reflexorum & refractorum Mysteria, Geometrice Enucleata (shelfmark Leibn. Marg. 94)
# Folio 11, page id 727094130:0023
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=727094130&page=23
# Source image: https://digitale-sammlungen.gwlb.de/content/727094130/jpgs/default/00000023.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 35 lines, status machine
# Lines: 35 recognised, mean confidence 0.90
# 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.

eludimus etzou itint citeotbucia un eta nceru iteo ea
monctrandum.
I NIMIEUI TL M
anguli L. L e de casant aoguti majoris
ue a LOLA L, ae us CIPCOS FE, Quod erae de
a LaeeLac
lisdem posiis; si angulus major fuerit angulus incidentiae alicujos
Radiie diaphanoraro in densum, es angulus minor refractio duto
ansulo incidentiae competens, fueritque ellipsis inventa, superficies
refractionis ex eodem diaphano raro in densum; dico omnes radios
axi ellipseos parallelos, es in ellipsim incidentes, in punctis inciden-
tiae Refringi, es in focum concurrere: Vocetur autem haec ellipsis,
ollipsis densiratis praedictorum diaphanorum.
X superiore discursu Analogico, videcur radios parallelos in
L uno plano disphani rari, congregari in unum punctum dia-
phani densioris, si modo superticies retractionis (c, elliplIS Certa
cujusdam dimensionis, sua disphanorum densiraci conveniat.
Ouoniam enim circulus congresat Radios Parallelos e medioraro
in unum punccum mediidensistimi; Parabola vero congregat ra-
dios parallelos, ex uno diaphano in punctum imaginarium, alcerius
diaphaniejuldem densiracis, infinice dictans; Sequicurigitur ellip
sim, quae media est incer halce figuras, radios parallelos in plano
diaptiani cari, congresare in unum punctum diaphani medioeriter
denlioris. Elis igicur praelibacis, ad demonstracionem hujus The-
cremaris experimentalem accedamus; ec suoponamus verum
esse, uc absurdum (A quod laceat) Pacetiat. Observavit Vicellio
retractionem aqux, comperencem angulo incidenciae in aere.
30: eAe 7: 30, & ex hac observatione ver praecedens Theore-
ma, ica inveniemus ellipleos dimentiones, sIC VE 5000O: SInUS
anguliincidentiae 30: ad 38268 sinum anguli retracti 22: 30.
ica 2000O axis ellipseos, ad 7654 distancia focorum. Fceodem
Theoremate reliquas refractiones ita Compuremus; uc, 10000
axis ellipseos ac 7654 distaDLiAM FOCOrUM, ita 27365 sinus anguli
incidentix 20, ad 13292 Ciuum anguli retracti: 90. 38: qui
ablacus ab angulo incidentix 100: retinquer angulum retractio-