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# Title: [Johannis Wallisii SS. Th. D. Geometriae Professoris Saviliani Oxoniae, Tractatus Duo] Johannis Wallisii SS. Th. D. Geometriæ Professoris Saviliani Oxoniæ, Tractatus Duo (shelfmark Leibn. Marg. 103)
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DE CISSOZDF
PrOD. 64 _ 73 drithm. Infin.) Fodem modo si respectire duca
cur eadem series v a, in seriem a inverlam, hoc etF in seriem :
D= a: vel D= = 2 a D + a, ACF Peries D= Va = 2D a V at a Va-
vel D= V a = 2 D V a + V a3, quae est ad seriem Aqualiu,
sivecoridem D= V D vel. V D, uc = - 4 F = 2d r, sive uC 16 ad
205. Fcsimiliter, R eadem series V a respective ducatur in ali: 8
series inverlas, prodibunc hae rationes subjectxe. Nempe h series
Va ducatur inverse in
series T. a.
rationes =
hoc est
e
4
15
277
a2
16
105
2X274
a
a.
14 96. 11 768
_c. ProdibunE
945 103950 etc.
2X2X4X6 2X2XAX6+B1
3X5 3X5X7 3ZGX7X9 3XGX7XGXI Y _Co
Si vero hi loci pro paribus habeantur, ex suppleaneur interjecti
Loci impares; ponendo, in locoterrio, (inter I e a,) proserie
a in V a inverse ducta, rationem F ad 2D (PeF PTOB. 167.
Arith. Infin.) Sicur ratio loci quarei mulciplicac rarionem secundi
Per 3, e hanc ratio sexti ver Z. 8c. manifeltum est (ex consecu-
cione seriei) rationem quinei mulciplicare rationem certii per 
ex similicer in reliquis. Nempe series Na dusta inverse in
Ceries
rationes 
F. Ya. a. Va. a. Va. ec. dabie
L, 2
E 2X2 2 X3, 2X2X4 +
4 2EI 3 21 3X52_ 6 3X5X72 4 X3 X Z
6
Unde, in praesens negorium hoc salrem seligendum est, series Va
e V a invicem inverse ductas, ad seriem aequalium, sive ad
D2= V D EOtICS SUPEU, UE - = X 2 2d 2; sive uE T ad 41.
11
Deinde, uc seriem va jam perpendimus, xerpendamus sini-
sirer seriem v’a. La nempe ducta in seriem a invertam, hoc est,
in D = a dac Seriem D V a = a ~ a, vel D d ae =  a cui
conrenic ratio 5= 7 ad 2, sire 4ad35. Ersimilirer in reliquis.
NemDe