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# Title: Ps. 2 (shelfmarks Leibn. Marg. 178, Stück 2; Leibn. Marg. 178)
# Folio 254, page id 175906937X:0278
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2.54.
F L E N. C U R V A R U p
prodiametro sectionis, ad quam ordinatim applicatae faciane on-
oulos aequales dato rel assumpro AB C, aue ejuldem ad duos
rectos supplemento. Quo facto, si per praedictae diametri verri-
cem C versus A Parabola describatur, cujus lacus rectum (F ei
dem diametro correspondens sit  a, quae que Parabola rectam
ATipSI B C parallelam secer in L: dico ejusdem Parabolae por-
tionem, inter rerticem C de punctum incerlectionis l interce
peam, nempe curram C CI, ese Locum quaelitum.
Sumpto enim in ea puncto urcunque, reluti D, demilsaque
per F pr D F. ipli C B parallela, si eadem D F vocetury, Cum = Cx natu-
mihus. ra Paraboles quadratum ipsius D P. sic x quale rectansulo sub FC
_ GF, d O F sIVC AO - AF SIE∞ = = X, aC FO DA, FaCt 
debicâ mulciplicatione, erit ry ∞ bb = a x. Ouod demonstran-
dum decerminandum que exat.
Ad explicationem au-
tem secundae hujus Theo-
rematis partis, iisdem ut
supra politis, ex A duca-
tur AO ip(I B C parallela
atque  = 2sumaturque
C A pro diametro, Xc.
peromnia, ut luPFa, exCC
Deo quod punctum inter-
sectionis LHIE in ReCTA AP.
Cum enim duca DH.
ipsi AB ParaIlela = CX N2-
tura Paraboles rectangu
lum Tub FC _ C,II cOn
tentum sic aequale quadra-
tOOx TID (eU A F, licque
Cthren= L aequefCa tacta mulcipli-
cacione, ut decet, erir bb = Ay ∞ X H. Quod erat propOlitum.
LCCielb
per ean.
Dem.