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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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Li O N C
-
 U N F U S.
28. In Numeris, IC. LoIId R = +. A= 2.
F. 936
0. 277-
0. 433 
0. 650
O. 866
T. 083-
T. 299 +
T. 516 -
F. 732 
79. Tertio. Si secetur Plano cZog, parallelo Rectaneulo CDB A
Fic. 2. Currae haec exit proprietas. Ductis Friangulis ut in Schemate; Frit, VE
SR (ordinata d quoris punctorum S, in areu Z. ;) ad 08, Peu L. P (ordinatam
2 Z, ubi planum cZ. 9 secat quadrantalem arcum:) sic elt aR seu AC (tOL
alcicudo,) ad 28 seu a0 (distanciam punctio a plano A aa parallelo Quadranti
CDO. ) PFOPtETARS, 055, Timilia triangula.
20. Magnicudines sic designo, in Speciebus,
CO = CD = R.
CP=
CiR = c.
2. = e0 = V: N = C 2
RS =  V: N - c
R a =
C A
A.
RS. R2: : 50 (= D Z,). 8a = 52.
V: R = c. A:: V: R = C 2. AV
5a == 82 = t
X
c3
R
2Y. FIX Currae (Si planis tiant aequali intersticio dilticis) projectae in Rectan.
outum (cui sune Parallela) CDB A: comparebune it in Percia Projectione
Fie. 28. Oux sic delincatur. Describatur Rectangulum C DB A (simile de aequale
ilII in Solido): EF Ouadrans C DO. Diridatur CC in quorlibet partes aquales
in punctis c. Et describantur Sinus seu Ordinatae c Z, cum co. sinibus Z. P. Tum,
si supponantur a lingulis punctis R in recta CD, recta R0 a parallelae ipA C A
secances quadrantem D in S, ee A B in a:) acque inibi, VF RS ad PZ; sic
AC (= aR) ad a0. Cvrrae q0P. in plano, reprasentabune relpectiras 90S in
Solido. Obinotandum; ut Rectae 5050 in prxcedente Projectiones Sic 2000 in
hac, secantur in partes aequales.
22. Prout Solidum potest pro libitu concinuari deortum, uera Ouactrancatet
Balin C D9. Sic ee Curra qoP continuari poltunt infinico. Fruntque, lic con
rinuatae, cum inter le, cum ad continuatam rectam BD Alymptora. Atque, A Soli.
dum concinvetur turlum, post decullationem in AB; abscindene eadem plana, in
oppolito Solido, Oppotiras Sectiones hilce similes.
23. Maxnicudines in Projectione, sic detisno, in Speciebus,
CD = a.
0. 242
8. 484. +
6. 726
0. 968.
F. 2T0 
c. 4) = +
Co
T. 694 +
 
 = 5 = V: R
SR = 5 = V: R 6
AC=
1
SR. Z P:: AC(= a R). 20.
0, 165
-
96
D. 66T
d
827-
0. 992 +
174
c. 323 -
5. ad:: A. = A.
2 - 2
P C
V: R
CXXY 3
A = L
n. LM