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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)
# Folio 684, page id 851708439:0708
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684
O N O - C, W N F 1 5.
c0-0
= 1
-
=V
n -0
22.  All Ct o, 46, bbtI A = l, A = 2.
CR
O. +
d. 625
O. 9
0. 866 +
6. 78T-
6. 6br. +
2
236+
2. 2.22 
2. 204 7
2. 179+
2. 106-
6. 404. +
L. 650
23. Secundo. Si secetur plano E dq parallelo quadrancali Bal CDO Fic. T.
Curra do geric Ellipls. Nam, Si secari supponacur Planum hoc, Friangulorum
aliquo ips CO A parallelorum: cum, ut A C ad A F, Teu a R ad 28; sic C ad
F. 9; _RS ad e0. EL consequenter, (cum Ordinata 50 fine ipsis RS ordinatis
in Circulo proporrionales,) erir Edq quacrans E. lip sEOS, Bt est CDC circuli quadrans.
24. Magnicudines sic detigno, in Speciebuo,
0. 875
CO D = 11.
Cik =C
R5 = -5 = V: R - c
F. = F
AC. AF:: C9 (= E8). GF:: RS. 50.
Lloce R. C: V: R . V: R 6.
Adeoque, 50=  Y: X L c
25. Fdiptes hae, (E abscindantur Planis aequati incersticio distiris) in Ouadran-
tem CDC (cui parallelae sunt) projecta, comparebunt ut in secunda Projectio.
ne, FI8. 27. Ouxe sic delineatur. Deleribatur COD quadrans, aequalis illi in
Solido. Fr diridatur CO in quodibet partes aequales, in punctis q; singulaque
 de
funet
Ps
Ordinata RS (huic parallelae) in punetis o: per quae si deseribantur Elliples uu
Do9; tx in Plano repraesentabune tocidem in Solido d5g.
76. Si ppolatu Solau, acortum continuari, itra Ouacrantalem BaLin puo
CDO; parallelae Sectiones etiam acthue Elliples erune: Sed cum hac disterencia,
C.D qua jam cst dimidia Diametri longioris, cum erie lemistis Diametri brevioris
in EdlipC: quales sunt in F18. 17. qua lunc ulera circularem Ouadrancem DC.
Et si Colidum concinvetur Cursum (polt decullationem in A B,) simileS OCCUPTeNE
Ellipses in Solido oppotico
17. Magnicudines in hao Projectione, sic desieno, in Spectebus,
l.1
L. 18
deon
votua
13. M
u
L. L:: N: X
B.F
28. Tn