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# Title: Où il répond à plusieurs difficultez qui luy ont esté proposées sur la Dioptrique, la Geometrie, & sur plusieurs autres sujets (shelfmark Leibn. Marg. 43:3)
# Folio 475, page id 82327652X:0503
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=82327652X&page=503
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# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 27 lines, status machine
# Lines: 27 recognised, mean confidence 0.77
# Machine transcription. Not an edition. Errors are expected: about 8% character error rate on Latin and French lines, higher on German.
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# After the first blank line: the recognised lines in reading order, one per line.

Edall
1b
tus
o 
ge sst
11
pess
L ML DESCARTFS.
Proposirio demonstrata a D. Deseartes.
Aca qualibet conica sectione, e puncto exrra eius
planum re libet siro, quaericur circulus qui sic basis
coniquem delcribiclinea recta, ex dato puncto, reverrice,
circa dacam conicam. sectionem converla. Nam quod su-
perticies ica deseripra sic conica non dubium eAt, et post
invencum circulum qui sic ejus basis Facile porest demon-
Arari.
Solutio.
Tianc propolicionem diuido in rres calus; Quorum pri.
musest cum data sectio est ellipsis, ex eius cenero punctum
dacum perpendicularirerincumbit; Secundus elt cum per-
pendicularis a puncto dato cadic alibi in axem dara elli-
Pleos, auc reiliber in axem darx hyperbola auc parabola;
Perrius denique cum exrraaxes cadit.
Primus casus.
Daca ellips B O L, X puncto A supra eius centrum D
depenaeulatiter crecto, de ataa LinCa A 1, auco
Dd