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# Title: [Johannis Wallis S. T. D. Geometriae Professoris Saviliani, in Celeberrima Academia Oxoniensi; Opera Mathematica] Johannis Wallis S. T. D. Geometriæ Professoris Saviliani, in Celeberrima Academia Oxoniensi; Opera Mathematica (shelfmarks Leibn. Marg. 100:1/2, Stück 1; Leibn. Marg. 100:1/2)
# Folio 402, page id 851387705:0422
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tum; (quia 2 = = = X2 = 3.) Si ad serrem Guouo uo oiteen
AREPAMETTCA PFOD. L XXXIV.
Patet ex L10D. 8F.
tum semiparabolae; (quia 2 = 0 = 2.) Et sic in aliis.
OP. LXXXIV.
rium.
YEL P respectivis rectis Trianculi primi AB D C3 secundi AL L, su
mantur certiae proporcionales: prodibit Frianeulum tertium ADB: Si
respectivis rectis complementi sestopt addu A D B, C Trianeuli AD F, pro-
dihit paralleloerammum ADB: Sivero l’arauiammi AD BC Lriancut
AD F, prodibit complementum semiparabolae AD B.
Seonitur ex praecedente. Ouadrata enim rectarum in Priangulo constimunt
Pyramidem. Fc similiter in reliquis. Oltendicur aurem parsprima in figura priori;
secunda es terria in potteriori.
PROP. IXXXV
Corollarium.
Gu2 F = Z 0.) St ac arcolletoe micibuno b falum.
 Exyramidoeides Parabolicum (series nempe Primanorum) ad Trianeu.
lum (aeque altum) respective applicetut. prodibit Parallelorrammum:
quia 2 = o = X.) Si ad semiparabolam, prodibit semparabola: (quia
=3.) Si ad semiparaboloeides cubicale, planum prodiens constabit ex
Secundanorum Radicibus Cubicis; (quia X = 3 = 3.) Fit pariter in aliis ejus.
modi applicationibus.
Patet EX PFOP. BF.
R OP.