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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 15, page id 85138403X:0031
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DF C+ODOTDF
ei in solido incegro haberi cerrum est: puca in AXis pun
eto 7.
AO. FiOdem FerE PTOceNU (UEaEIS UTAndIS, UE SuPTAS 3Z,) Centru se
colligitur cenerum graritatis semisolidi ex convertione segmenti misortar ca
SZ C F circa rectam A F; _E CONSEGUeNLEF CFIAI CCHETUM OFA-
vicaris semisolidi ex conversione sermenti CZ Y, tum circa re-
EtAM A F, cum _ Circa rectaM V Y.
50. Tandem Cuverest ut centrum sravicaris semisolidi ex mgolidi
convertione Semiercloidis circa rectam C F inveltigemus. circa l. 
Nempe si semisolidum illud plano abscindatur quod plano C AF
in recta C F recte insistaE; IMAMIFECEUI CAE GFAVIEAEIS CCHEIUM
fore in ipso plano C A F. Ouaericur, in quonam ejus puncto. HIOc
ModO.
sT. Semisolidum ex convextione crianguli o F P, eric semico-
nUS exCAVATUS; cujuS Propterea cenerum graVIEaLIS, (I CUEVATU
rain demas, erir in rectxe Z F ponctoH, quod abscindat F H=
22F; (nempe in recta 2 F sic secta uc secanda esset F X, ad
inveniendum cenerum gravicatis hujus solidi integris) sed dein-
de, proprer curvaturam semicircularem vertus rectam C F, (A
verum orariratis cenerum indagare libeat,) abscindenda elt rectae
HIh; ea porrio versus H, quae sit ad tocam HI h uc diameter circuli
ad semicircumterenciam; (sc vrique diridendus est axis Pemicir-
culi ut habeatur Cemiperipheria CenETUM GPAVIEALIS.)
52. Semisolidum autem, ex convertone Traperii V BoP, est
Frultum coni excaratum; cujus centrum gravicatis (si curvatu
eam demas) est in rectae EZ eo puncto, puca K, quo ica dividi-
eur uc dividenda esset F Y ad inveniendum cenerum gravitatIS
hujus solidi incegri, nempe excavati Frulti conici. Centrum
AULEM GFAVICAEIS VeTUM, CFE (PTOPTEF CUEVATuTaM) in rectae I. K
eo puncco quo ica diriditur ue de IIh modo diximus.
53. Cum icaque horum Femisolidorum rariO IMOMCNEOTM,
cum respectu rectae C F, tum reCtR A F, COMPONAtUE ex PaLIO-
nibus magnicudinem _ distantiarum reperientur puncta F, a, (-
mili fere mechodo quo supra; adeoque e punctum s, centrum
saricatis semisolidi; et simul centrum gravicaris folidiinceori,
pura punctum AXIS A.
54. Cumeue similicer Faciendum si (mucatis murandis uE S Centrum
3F, 49,) de semisolido ex convertione segmenti, Puta EZ C F; solidi ex
PaTILeF seementO
semento
Centrum se-