# Leibniz Legible — https://leibnizlegible.com
# Page: https://leibnizlegible.com/page/727094130:0042
# Permalink to this reading: https://leibnizlegible.com/page/727094130:0042?run=74
# Title: Optica Promota, Seu Abdita radiorum reflexorum & refractorum Mysteria, Geometrice Enucleata (shelfmark Leibn. Marg. 94)
# Folio 30, page id 727094130:0042
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=727094130&page=42
# Source image: https://digitale-sammlungen.gwlb.de/content/727094130/jpgs/default/00000042.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 36 lines, status machine
# Lines: 36 recognised, mean confidence 0.81
# 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.

O. Rujus.
12. Hujus.
3. 1 115.
(6. I2V115.
ios reffecti, e diverei a puncto B. Sic enim ex illis, UnuS AM
incidens in punctum M; qui, quoniam axi Conoidis eAt parallelus,
habebic parabolam M L. R (ex qua delcribitur Conois) super-
ficiem refectionis: ducatur per M linea HIMC cangens para-
bola MI. R in M, _ producatur radius A M in P, _ ex B ducatuE
BN, per punctum M; _ crie angulus BMC, aequalis aneuto
PMEI, hoc est NM H, aequalis angulo A M O; reféctieur igitur
aM in N: Quod erar octendendum.
Dioptrice.
inc radii parallem lL4656. Ia L
laxena, L aVelSANE eX
puncto B; lence cujus
vercex incidentia V, e
mersionis aucem O. Ra-
dii A A esc. OpC plana
ccta (cui LstMalolune
DarallelIMICAMCE, d in
ta LeO
aralleli, ex
AACUE; O.
tet SPAX
C Lupetetet, per 
ipsi radii) inera lencem
duncto dive
de Conoidis.
Oidis, Cujus vertex O
Corollarium
t ta d
ubtind
Eix hoc etiam sequitur, radios Palulelos diversi ex aliquo pun-
Ao circirex B, etimmlinom sims geomerrice paralleti ip sBL.
PFOP.