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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. V.
25, FF 2 Cingulis harum Constructionum, derirari poterit tanta CaTuUM 
Conlequentium vatieras, (Fisuraque tormari huic diver(itati CongruX;) uc 583
de lequencibus, tir d Constructione Prima. Sed hisce particularim recentendis
abstinco; id eorum industria permiccens, quibus libicum est (exercirii sui Bra-
iia) has ica prosequi prouc eso constructionem Primam prosecutus sum.
De Sextuplatione es Sextisectione Arcus Del neuli. A.
Insq; consequentibus Multiplicationibus e Sectionibus.
T. CEcundum easdem Methodos, inrestisari postune sexruplatio, Sepruplatio,
et consequentes Areus Anoulire Mulciplicationes. Vr et corum Sexti
a sectiones, Seprifectiones, e consequentes Sectiones. Ouas cgo faltem
breriter actingam.
2. Sextuplatio haberi porest, Priplando Duplum, vel Duplando Triplum. F,F
Sextileetio, Bilecando Suberiplum, vel Prisecando Subduplum. Ut per se patet.
Idemque valet, mucatis mutanais, in aliis Mulciplicationibus et Sectionibus, d
numero Compotico denominatis. Nam Mulciplicationes et Sectiones, successive
factae, prout postulant numeri Componentes talem Compotuum; tancundem lunt
acli una vice per Compolirum tierent.
3. Si auTEM NON FOTET SEX nuerUIS CompOTitIS, aut SI SiC tractetur qual non
FOVET: Porest tamen Sexcuplacio ee Sextisectio, pariter praectari, ue in ante tra-
ditis Calibus tactum cst. Nimieum,
4. Si Circulo inscribatur Ouadrilaterum; Cujus opposita Latera Sint B, B.
subcenta Dupli arcus; _ B, C, subrentx Dupli e Sexcupli; e Diagonales D, D
subrentae Ouadrupli: Tum Dg- B9 = BC. Ec B) D9- B9 (C.
AN GUL AR TBHS.
XLC Z FIL.
V
c.
EFD) F9 = A9 (G.
Vel; Sunto oppolica Latera 1 B; _ C
A, DF = A
3 = CC. EF C) DF = AB(C.
XEV
Sunte OpDOLIta Lateta A, A; et D, C; et Diagonales F, F. Tum est
C; et Diagonales D, P. Tum
aLXVI
Vel; Sunco opposita Latera, A, C; d
F = AC = BC. Et B) CF = AC (6.
Cbb3
6. e Dine onaleo C, P. Xum C.
8. Adeoque