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# Title: [Lectiones XVIII, Cantabrigiae in Scholis publicis habitae] Lectiones XVIII, Cantabrigiæ in Scholis publicis habitæ (shelfmarks Leibn. Marg. 0; ZEN Leibn. Marg. 0)
# Folio 126, page id 797435492:0368
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E C 26 
LadL = V2 APM. _E (IEZ O CUTrR AZ K perpendi
cularis; exit P. M =PO.
d  A P = X; BC A PM = - quarEP Z = V
unde reperictur P O=
erit Parabola.
X
=P M; dc rursuS AMB
Probl. VITI.
Sic figura quaeris AD B (rectis D A, D B, S linea A M B com.
Drehenta) e à Duccunque projecta recta DM, datum Cir sparium
ADM; oportet rectam DM detinire.
Accepta quapiam R, sit D Z =
2 ADMI
; _Z O CUrVE AZK
perpendicularis; cui occurrat. D EI ad DM Derpendicularis;
exITDM = N R A DO.
Aliter. Sit DZ = V 4 A DM; BEZO CUTTX AZ K perpen
dicularis; cui Occurrat D H ad DZ perpendicularis; exit D M
== NDLXDO.
Defrouris involutis es evolutis bellam ontiter instituit Practarus Ce-
ometra D. Grecorius Alerd. Alienae messinollem ego Falcem meam
immittere, verum liceat urcunque ilthuc pertinentes (aliud agenti quae
mihi se ingesserunt) unam aut alteram obserratiunculam his intexere.
Probl. l2
Data sit figura quaepiam A LD (cujus axis A D, basis VB) opoI.
F18. 190
218. 19I
ec ei congruentem involutam extribere.
F18. 2920
Contro C, intervallo quoxiam C L describatur Cirenlus LX X; Sit
durem curra KZ Z raliS, u Po  eCa MML  a BD Da
d LbL9