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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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Cap. IV.
A N GUL AR FB IS.
23. Or subtensa areus Duxli, ad subtensam Fript: su subiensa Duadrupti ad
Aegreeatum subtensarum simpli (quintante minoris) e duincupti.
iec D - 2 R4A = Ac
3RqA- AC
24. Sed C -
R9
C
R9
6R99A4 -5 R9H99 L Aec Y: 4 R 4 = A g. Similicer, B = f Y. 4R9- A9. adeoque
Rc9
BA = = 2 Y: 4 R4 Ag L LPTOPteTCA CD. BA - BF. - 5R49A9- 5R9A99 + AcC
RC9
4R9 - A9. FF (dividendo per B = p Y: +R4-- Ag. veringue) 5R99A - 5RgAC + Acq
F
SRggF = sRGF C +. FCG. ut prius.
R99
R44
25. Vel sic idem COMpULMUS. Ouoniam B A uf B F = C D =
6R99A9. - 5R9 A94 + ACC
RC9
urinque) eric CD -629 A- sRgne + AcA = A + F. F, 349 A- sRgAe + Aeq
=F. UE priuS.
R99
R94
26. Vel Sic. Ouoniam B A F BF = C. D; adeoque = C = A F F. Trem D =
2R4A = A
RC
R9
;tacit
Et SRg9A = 5 RgAC + ACA =F. ut prius.
R94
R99
=2R4 - A9
RG
23. Sin arcus quincuplandus sic Ouintanscircumterentiae; (aut etiam duo plu-
retre quintantes;) Et, consequenter, arcus quincuplus sic incegra Rerolutio (aut.
plures inccsrae Reroluciones:) Subienta Ouincupli eranelcet, vel nihilo aequa
BituE.
28. Adeoque, hoc casiu, 5 R9gA - , RgAC F ACG = F = 0. FL SRGG A = sRGAC
R99
= AC9 =O. EFSR99 -5R gA9 F A 99 = 0. Scu5 R99 = 5 R9A9 - A99.
A99 SRA4 A99
R4 R R9. Ouxe est Quadrarica A: qua-
iio, cujus Radix et =2, e Coefficiens medii cermini 5 R, et Ouauvicas abso.
Iuta 5R4.
29. Ergo (Resolrendo hane Aquationem) Z R = V: ZR 9 = 5R9: =
ER LYZR9 -3
VER-
30. Cujus squationis ambiguae, Minor Radix est hic elixenda; (ut post pa.
cebic.) HHoc eA S= RG = A9. Adeoque RY S = V = (= R V: Y2 ~Y5 = 1:) =A,
Eubrenta Ouincantis. Hoc Ct
37. Ractius ductas in V aequatur dubtensa mao sedt eta
duum 72.
2
32. Idem