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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)
# Folio 55, page id 85138403X:0071
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DE CTOLOEDE.
Ex (CMICONVEHLONC CVEVA A C (H8. L. Vel 8) cirea A F, delignan- Supersiciei,
SUML REQUIEUHEUE.
55. Superest, ut centrum gravitaris superficiei, quae Semicon- sione circt
vertione ejusdem C a curvae circa C F converlae describieur, C F facta,
invelligemus. Duod quidem jam parrim peractum cAt. GUUm centrum;
CHIML (DEOPEET BIHdEU GLaMCICaCuM secipIOCatiOneS, uE aliquo quantum di-
ties dictum elt,) idem siC, respectu rectX A F, momeneum su- stat ab AF.
perticiei quae convertione C A currae circa C F describieur; ac-
que, respectu rectae C F, momentum Puperficiei quae ejusdem
CirCa A P convertione describitur: Sirque hoc superius inveneum
=23: Licia illud CMILIEET INVeNEUM CFIE.
56. Invenimus urique (= 23) Eocta ex omnibus Z Z in Z. Y
A9. 8. respectire ductis (curra C A in punctis J aqualicer divi-
la) esse ZD= P,- E3D. Adeoque (pro Ridiis relticuendo ubi-
que Peripherias, hoc est, dividendo per ZD e mulciplicando per
E) erit =DP. = =FD P momencum circulorum onnium punctis
Z descriprorum, sire radiis Z. Z in distuntiis Z. Y suspentorum, sive
radiis Z Y in diltanciis Z Z Suspentorum; hoc ett, superficiei
convertione C A curra circa A F descripcae, respectu rectae C F
vel, conrertione circa CP, respectu reCtX A L.
57. HIOc itaque superficiei mOmenEUM COnreRSIOnC CIECAC F
delcriptae, li per ejusdem magnicudinem, hoc est, Der 2 D2-
LE RP (UE supra  16,) vel 2 P =SDP, diridarur; habebieur
30P = 52D
15 P.60D distancia centri geavicaris superficiei conver-
sione (vel semiconvertione) curVX C A circa C F descriprae, ab
A F recta.
58. Omancum aurem idem gravicaris cenerum (superficiei ex distat à CL
lemiconvertione C A currae circa F C descriprae) ab F C diltac,
sic inguirimus. Semiperipheriarum punctis Z Ag. 8. circa FC
descripearum, cum magnicudines, cum e carundem centrorum
Gravitatis ab F C distancia, sune rectis Z. Y proportionales. Froo
singularum momenra respectu ejusdem F C, Tuneuc quadrara rc- L18.0, 10
ctarum L X Ag. 8. hoc est (per _ 8) rectarum V vHg. 1O. A-
deoque omnium momenea lune ad momenta coridem cadio l A
delcripearum; Hloc elt, momentum superficiei quae Pemicon-
VerLIONE CUIVX C A AB. B. circa FC deleribicur, ad momencum
suxerticiei
miconver
F18.8.
Onantum