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# Title: [Johannis Wallis S. T. D. Geometriae Professoris Saviliani, in Celeberrima Academia Oxoniensi, De Algebra Tractatus; Historicus & Practicus. Anno 1685 Anglice editus; Nunc Auctus Latine. Cum variis Appendicibus; Partim prius editis Anglice, Partim nunc primum editis] Johannis Wallis S. T. D. Geometriæ Professoris Saviliani, in Celeberrima Academia Oxoniensi, De Algebra Tractatus; Historicus & Practicus. Anno 1685 Anglice editus; Nunc Auctus Latine. Cum variis Appendicibus; Partim prius editis Anglice, Partim nunc primum editis (shelfmarks Leibn. Marg. 100:1/2, Stück 2; Leibn. Marg. 100:1/2)
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A L V F B R A.
Cap. XCVII.
ve quemlibet,) Fieura ex Paralleloer ammis inseripta, erit, in Triansulo = 2b; in
Parabola ab; in Complemento Parabolae  ab. Duod, alibi demon-
stracum, (Nempe, ad PrOB. 8, et 15, cap. Praeced. hujus, ) lonsius est quam ul hic
commode inseratur.
loc est, Posito 2. = 4; erit in Parabolae complemento, E; in Triansulo, 3: in
Parabolan 7. P0 sito 2. - 9; erit b 283 28. Posito 2. = 200; erit gn rn 4 9 2 33. Lt in
aliis casibus similiter.
Sed, quo propius 2. superat X, eo propius accedet Freura inseripta ad expositam. Adeoque,
posito, verbi gratia, 2. == Z. 00O2OOOT, (quadrato numero, quo sit V2 non Surdus; nempe
V. c. = 2. 0OOT;) erit in P arabola Complemento, 5. 9002, 00OL,
In Frianecuto D. D002, 00OT,
0.0004,0006,0004,0007
00006,0025, 0020,0025,000, 000L
is
In Parabola
0.0002,0001,
93003,00O3, ODOT. Dux pro
vime accedunt, ad 3, 23; quae est vera ratio Fieurarum expositarum. Duod masis
achue patebit, si pro 2. 000T, sumeretur 2. 000000OL; aut si plures achue Ciphrae
quotlibet interponerentur locis Fractionum decimalium.
Verum schujusmodi Fieurae concipiantur insemet inverse positae (seu,ut tu loque
ris subcontrarie, ductae: Ducentur, non quidem planum in planum, quo fiat pla-
eeeee
noplanum, sed Ordinatae in Ordinatas respective sumptas, (manente ubique quae
erius erat communi alsicudine.) Iloc est,  BB Bectaneulum, in Mricudimem B A,
 Sie in caeteris.
(Sua itaque Atitudo, si foret, ut apudme ubique eadem; neglei jure posset; ut
sola haberetur Rectaneulorum consideratio: Tlic vero, quoniam est alibi alia, ad caler-
lum revocanda est.)
Veletiam AB Paralleloerammum, in Suanem B B, e sie in reliquis. ZLoC
estus ABxBBrBB, BCKCYKCC, CDKDdXDd, BC.
Adeoque parces Solidi adjacentis Trianeulo;
,88c. seu = = in 2- =
=2 ec. Hoc est, 2 = 
+= 76 3 Bc.) minus, 
minus.
3 - 2
Adjacentis Complemento P arabolae
D
2 3+  2 9 2 2,C. sect  =9: 2 - 2. + 20 : 2. = 1.
u : 23 - 2. 8c. THoC est,  = in2 - 22 + X, F, 10 in 24 = 22
+2, 4   in 2 = 22 + 1, B0. Htoe est 
3c. bc est, omninoz-
2+2 - 2