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# Title: [Johannis Wallis S. T. D. Geometriae Professoris Saviliani, in Celeberrima Academia Oxoniensi; Opera Mathematica] Johannis Wallis S. T. D. Geometriæ Professoris Saviliani, in Celeberrima Academia Oxoniensi; Opera Mathematica (shelfmarks Leibn. Marg. 100:1/2, Stück 1; Leibn. Marg. 100:1/2)
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De Calculo Centri Cravitatis.Ca p. V.
in Puncto unico concurrencibus,) ut circuli, EIlipscos, Parallelo-
exammis Plani Solidire regularis, Parallelepipedi, SptiXrX, SphX
rocideos; Cencrum Craricaris hinc determinabicur.
mo ne, ec
sD,
1D, dc
tDP + ms DP. LnDC, c
Tam, s Pondera Ponderibus respectivis sint A qualia, (puta, uxinque IP.
m F, nP, _c.) e in Diltantiis respectire aequalibus, (puta rD, SD, FD, ec
utrihique,) erutie ucrinque aequalia Momenta ErDP L in sDP + nFDP, ec.
Adeoque, Centrum Graricaris in diridente Plano. per L5 C ap. 4.
Et quidem, ubi sune hujusmodi plura Plana, quorum communis sectio sit Pun-
ctum unicum; iptum Centrum Graritaris dererminatur. Per 26 C ap. 4
Ouodaurem haec enumeratis Lineis et Figuris (et harum similibus) conreni-
ant: Fx earum Detinicionibus manifestum el, aur inde tacile demonttrabicur.
SC +7OLZOM
TOcandum tamen; de Curris Parabolicis, Hyperbolieis, FHlipricis, (quod et de
d harum limilibus intelligendums) diserre dictum este, Axe producto bisccan-
495; Cnon, quavis diametro:) Nam, nili Punctum bilectionis, lc in AXis vertice
Bilecta linea non eric ucrinque similiter curra. AC in Parabola, Hyperbolx, aue
Ellipseos, Porrionibus Planis, (recta abseissis; quippe de his incelligendum:) oux-
vis Diamerer basin coramque aream bilecans, rem praestat
Dimi aurem has Linearum aut Figurarum species enumerarimus; alias tamen in.
numeras reperiri cercum cst; De quibus Demonstratio non minus procedic; sunE.
que sub propolirione generali comprehensx. Nobis incerim famoliores aliquot
enumerasse lutticie.
Ponderum, quae ex eadem parre Punt, quantacunque inxequalitas, aue quantacun-
que rarieras distantiarum, demonstrarioni non ollicit: dummodo in comparandis
quae utrinque Tunt, si aequalicas. Sed et, in prop. sequente, major adhuc erit va-
riandi licentia.
1P
PRC
Iem; Si Finea vel Figura quaevis (plana, curra, Colica,) ila Plane
diridatur; ut snscla us senenet pallicuta, lingulis alterius re
sectire cumtous alulee. Centrum Craricaris est in Plano
diridente.
MP.
n
nomodemotdmode nide.
DOra; Si CX Una parTC POndera IP, mP, ne, sine in distanciis rD, SD, LD: ex
altera vero, Ponderar P, SP, LP, in diltantiis VD, m D, n D: Vccunque (propter
Pondera diltantiis reciproce proporrionalia) comparara comparandis respective
aequiponderabune. Adeoque, cum lingula singulis respectire tumpris aeguiponde-
renC; etiam omnia omnibus aequiponderabunt: (per I2 Pl. 5. ) Erirque Proprerca
Cencrum Craricatio in Disidence P1an0. Per 15 Cap. 4.
rsor etui
se se 
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