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# Title: Leibniz-Handschriften zur Mathematik LH 35, 13, 1
# Folio 281r, page id 00068196:0557
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fanterib 1d)
ocus
de inquisitione in curvam
Modus describendi curvam Cper tangentis
proprietatem  quando propiieles est
exearum numo quae videntur nimus
 determinatae, seu ubi suspicio impossigilitatis
n
Unius cujusq Conicae proprietas est, ut
si  punctorum a. b. tangentes
concurcant in D, et ducatur DB
p ad focum oppositum B, si tunc
-
angulus bBa bisectus per
um visecetur per rectam DB.
hinc in Hyperbola pambola
ubi focus oppositus infinite abest
DD est axi parallela
vata sint puncta B.R, b. B. D quaeritur
punotum Aa
e
e
pates ddari rectam indefinitar
datur enim angulus IBA
a quaeritur quomodo duccuda ad eam Da
sumatur alia (D) jungantur (D) B ei ducatur
indefinita A. patet Da et Da ita duci debere
aud
ae
SiL
d+
1
ut si se secent in (D)) ut ducta (D)) B sit
angulus aB (a) per eam bisectus. Re
ergo redit ad hoc problema. duabus rectis
Expositione datis Bm, BM ita ad eas
 duaere ex punctis
D. (D) rectas Da. (D) (a)
e
 =3
M
ut ut ex earum puncto intersectionis 
ducta (D) B bisecet angulum a B (ap. Quod
facilius scuiemus si considerem, et rectam B((1))
esse positione datam. Patet autem nec sic