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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)
# Folio 693, page id 851387705:0713
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PrOP. L. Se cuamoii  avitatis.
versionibus; puta, H Fatabora alare ex jam cractaris figuris, circa Balem vel
AXem, vel rectam Axi parallelam conversa, intelligatur figuram Solidam deseri
bere; aliaque hujusivodi. Abstinui tamen; partim, quia ad jam tradtitorum me-
dum pocerie his limilia Lector ipse pro libitu plura subjunsere (uo Marte: par
rim etiam, quia eadem, sequentum aliquor provolitionum op ucCMS d Li-
ul univertalius tracentur: maxime vero ne caedium crearem Lectoribus i sIS
ellem in hisce conserendis; praserrim cum tanta seges hic se otterat, ut vel IB
cilesium carpenci, nimis incumeleat Capuc hoc De Calculo Centri Graricatis.
SC HOL. ZVM
Padiaus hactens, Ca Praeterrim qua FsuraS Spectant, (planas Solidatre,)
a ad quarum Diametros vel AXeS, quae Ordinatim applicanEUE (recta aue plana)
sunt secundum ordinacam aliquam (ex iisquas deF. F _C 2 HUjIS CapIEIS ACLMIIM.
muS) Seriem constituta. Oux quidem ad cencrum gravitatis in tiguris innumeris
determinandum viam aperiune: F.X nostra Infinitorum Srithmetica plurimum De-
cita: Oux tamen adhue facile ampliabir peritus Geometra, es pluribus acthue cati-
bus innumeris accommodabit.
Ouoniam rero non omnes tisurx ordinatam hate Consticurionem lortiuntur:
quo aliis ucur inordinaris consulatur; sEquenEE PTOPOLILIBHC HICLLIOIIE alIMIC Ma-
eis generalem exhihemus; ordinatis juxca acque inordinaris paricer applicabilem.
Si diridi intelligatur Libra quaeris, in partes quotlibet aequales, (u-
mero vel finitas vel infinitas,) in distantiis a motus sui Centro vel
tice proportionalibus politas; ponderibus, aut ponderum particu-
lis, (aequalibus aut inaequalibus, ordinatis rel inotat,) Ulcun-
qe graratas: Paque quibus grarantur pondera, scu ponderum par-
ticula, in suam quaquo ab axc motus (C Plaio peraxem) diltan-
tiam ducantur; hoc es toties Cumatur Gllade particula quoto, est
ridebitur maxime expedire, consequi licebit:) Llabeus (relpecti
ejuldem axis) Momentum omnium; et hujus ope (cognita maoni-
tudine) distancia Centri Graritaris, ab illo per arem plano.
Nceslieneur, in A P libra, parces invicem equales, AB, BC, CD, dc. quarulae
diltanciae (auc mediorum in illis punctorum) à morus axe X, (aue, l partes
incelligantur infinite exisux, ab ipso A pun.
Eto) LInEHE L, 2, 3, Sc. arithmetice pFODOE.
tionales; tuis quaeque ponderibus (aequali-
bis auE inaequalibnS) a 6, 7,5, Scc. Onustae
Ouorum quodque tocres lumatur, quoto est
ab aXC motus loco.
Puta: 20, 26, 33, 4 5, Feu a, C +. 6, 7 +
F 8, _cc. HIOc eA (in Parci.
bus intinice exignis) omnes onulta BB, CC
DD, Scc. Triansulum rel Ongulam AP. P
complentes.
nice exiguis) omnes onultae rectae A E, BE, Ci L .  A L. L. Uat C
vel unsulam complentes.
AF demipris OMIIIBIIS A B, A C, AD, Cc. Hoc est, (in partibus infinice exiguIS,)
Pacalle toxrammum seu Prilma (onultum) A L. F. c, minus (onulto) Triangulo ret
Ongula contraria AP. c.
dETC
_c. Arichme
AxC (aut perpencculari per axem plato) ut L, 2
ipCa loco ab axc motus; (Duod rariis methodis, prout cuique casui
fie
Auc eriam, a f 6- f 7 f S, 6. f y = s, y. F s, dcc. Hoc Cst, (in parcibus infi-
Aut eTtaM  A L AL = AB, AL = AC, Al.= AB, dc. Hoc et colidem
AHC