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# Title: Leibniz-Handschriften zur Mathematik LH 35, 13, 1
# Folio 281v, page id 00068196:0558
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rem esse determinatum, nisi praete
prenctum in curva datum etiam
aliud punctum ut a dalum assumam
vo facto dabitur et recta B a, et.
(a)
ca
-
dabitur et recta D a et
B (D) ergo et recta punctam
 nunc supersunt tantum
puncta (a) et (D) 4 seu deccenda
est recta (N) (D) per punctum (D)
prvenetur vero punctum (B (D) recta
angulo
bB (a) bifecto per recta
D) ipsi langent b Doccurrente.
in recta (D) dita invento ergo
punctos D) facibe habetur A
epetamus: datur puncta aurvae a. b, et focus B
eunguntur bB. aB. angulum bBa bisecet rectae q nlu
ponatur dari et tangens punti b. hnic biseeans ourret
rainguli, occurret in D. juncta Da erit etiam lungens
assumatur alia recta BCa)  infinita, curvam secans
ra
in a, quaeritur punctum (a). Hoc ita invenietur
agulus a B n bisecetur rectu indefinita Bp. et
a producatur donec ipsi Bp occurrat in (D)
Luisus angulus b  bBIa) bisecetur ecta
H B(D) occurrenti ipsa B productae in (
ajo ipsam D) (D)) punctum et producta
icurdae occurrere in (a) ibius eam tangere.
si enim non sit tangens prcti (a) in recta B(a)n. erit
alia, utique (a)(D) ajo eam coincidere ipsi a (DY vel (Dt
e
(D) id est transire per D. alioqui euom rectam BPy
non secaret, ubi tangens D(D)) quod tamen necesse e
per superiora. Si ergo transit per CD eut ileae
opsa quam duximus.
ita ergo reometrice inve
lare possumus quoscunque curvas puncta extungentia
piro priatate.
p5