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# Title: Optica Promota, Seu Abdita radiorum reflexorum & refractorum Mysteria, Geometrice Enucleata (shelfmark Leibn. Marg. 94)
# Folio 18, page id 727094130:0030
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=727094130&page=30
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# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 36 lines, status machine
# Lines: 36 recognised, mean confidence 0.83
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# After the first blank line: the recognised lines in reading order, one per line.

2. TB.
Scholium.
Den
vendicutaris ad
communem se
ctionem F L. 3. C.
ricHIC+ F
P1d-
BC EtO. etc Pla-
num HIGF) ad
planum B AD.
erune normalia,
soa etat a
LAOMLEEadUI
dicularis ad pla-
nUM ABD: er
10 _ OM
MIper EIC du-
cta, (C quorum
Hlaec eris Femmata, eodem sere modo demonlcrantur, in om
nibus folidis ex circumrolucione genicis.
L LF. LMCOTCIa.
Si superficies densi, ant Poliri, fuerit superficies Conoidis, aut Sphae-
roidis, fuerit que lines incidentia in eodem plano cum axe Conoidis,
vel Sphaeroidis: sectio Conica, ex qua cenita est Covois, vel Sphae-
rois, semper erit superficies Rofractionis, vel Restectionis.
TcConois, vel Spharois A BC, densum vel politum; cujus
axis AD. Cicque liner M L. in eodem cun axe plano, inci-
dens in superticiem deni, vel polici in puncto L: Dico super
ficiem reflectionis, vel retsactionis, livex incidencia ML, esse
eandem sectionem conicum, ex qua describitur Conois, vel Sphr-
rois. Ducatur plonum P s HlG, cangens Conoidem, vel Sphae-
roidem in puncto L: ec patec ex doctrina opricorum illud planum
esse superticiem redectionis, vel retrectionis, linex incidencix
Mt L, quod perpendicularirei secat planum FFHC, in punctoL,
eta ux linen incidencix ML, in eo eristati, Si vero per adem A Id,