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# Title: Qua Continentur De Angulo Contactus & Semicirculi, Disquisitio Geometrica. De Sectionibus Conicis Tractatus. Arithmetica Infinitorum: sive de Curvilineorum quadraturâ, &c. Eclipseos Solaris Observatio (shelfmark Leibn. Marg. 84:2)
# Folio 112, page id 824573315:0324
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F 7 = 205 LE
3X7
ProP. 140,T4.F.
3a5 D+ + 3a2D= = 2
_CuT9; ad
DSF+ + 3D
F8 = 10 - 
Z X 4X b
4X6x8XXO
Ec SIC deinceps; puta
2X4X6X8X10
Cubi
2XAZBLBXTOX Y2
6X8X 1OX I2 X T4 X 26~ 7XGXTIX L3X LGXI7X (9 _C.
PROP. CXL. Corol.
Dem accidet, A series Agualium muletata serie Secun-
danorum, ducatur in Jeriem Primanorum. Et illins
Duadrata Cmbi, ec. in Quadrata, Cnhos  c. hujus.
(Puca, Crectae in Cemiparabola, diamerro parallelae, ducan-
cur in rectas Parallelogrammi circumleripei: nam carum
concinuationes, in complemento, tunc scries Secundano.
Tum.)
Ouia nempe D = a 2 in a eA aD  a. _C.
P R O P. C.XLI. Theorema.
CI exponatur series Primanorum muletata Terie
Ouarcanorum; Residuorum Cuadrata, Cubi,
ecc. ad seriem A qualium, rationem habebunt cogni-
tam. Nempe
arithmetica Infinitorum.
p
12
Duadraca.
+ a
2+D
ReSidus
_C. ad
D+
BL. u(9: 2d
 2D= D
Rehaca