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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 94, page id 797435492:0322
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 t e le d tas
  
NV
TCTIVa
I. Um pridem ante plures annos illustris Viri, Christiani Tlugeni
Cpolomerrica lustrarem, ac in eo verlatus adverrerem ad id
nesotii duaspraelertim ab ipso methodos adhiberi; quarum una Cir-
culi seementum duobus parabolicis (uni inseripto, alteri adscripro)
medium esse monstrans, illius inde magnicudini limites praescribie;
altera Paraboliei seementi, e Parabbelocrammi aeque altorum cen-
eris gravitatum medium interjacere centrum gravicaris circularis leg.
menti octendens, alteros exinde limires, adsignat; incidir mihi cogi-
cario posse loco parabola in prima methodo, nec non vice Parallelo-
Srammi in secunda, parabolitormium aliquam circulari segmento cir
cum seriptibilem ulurpari, sic ut res aliquanto proxius actingatur; id
mox verum esse re perpensa comperi; quine prarerea norari Facilesup-
Pares methodos Fyperbolisi seementi dimensioni accommodari. Ouo-
rum demonstrario (prae aliis fortalle, qua exeosirari ponent) brevis
de clara cum e supra poticis consequatur aut pendeat, eam (alioquin
opinor haud injucundam) hic visum est apponere.
II. Adlumimus auremtxec perrulsara; quorumque demonstrario-
nes e praemonstratis haud difficile variis modis colligantur. (I parabo-
liformis B A E (cujus Axis AD, Basis vel Ordinata BDF, Tan-
gens BT; Gravitatis centrum R) exponens Lit; exir Area BAF
M- (. m
ADXBE; ∞ FD =  AD, B. RD =
n. 27
AD.
TIT. Sint AuIX quarIS CUrVX AE B, AFB Cquarum communis
axis AD, ordinata DB) ita se habentes, ut duet a quacunque recta
F F C ad BD parallela, gux lineas expolitas punctis F, F, C3 sccet, po.
sitoque quod rectae FS, FFransant curras; (illa curram AE B, haec
iplam
Fi9, 133.
Fr. 134.