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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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596
De Calculo Centri Cravitatis.
Cap. V
Duncto nad balis plaium demilta.
Cepuris erectae.  unris eella exie cum propolicio, cum Demonstratio.
plentes Solidum Prisimacieu BD Y 7, ipsi Cn recta aeque alum:) Adenque B DSB
Fructum, est Tolido Prismarico BDrr 2, aequale. o ea a.
Atque perinde omnio ralet haec demonstratio, sire bali BD intillens tolidum
Prismacicum, ejutre tructum, Rectum CE, Sive Tnelinatum: Dummodo CoLN
do censeatur recta Cn alticudo, acque prismatis; nempe recta perpendeclari a
Supponit aurem demonstratio, communem planorum sectone Z, exIra Figu-
ram, (saltem non incia, sed in ipso Fortan Colidi extremo,) lecus enim, non exit
eadem Inccori de Lenet Balis, quod supponit Provolitio.
Sin planum secans, flatio Balis intra tixuram occurrat; MMCendum CxIE eo-
ulque deortum concinuaca tolidum, ut Frusti sesmenta auo linc; alterum (u
pra de alcerum intra BD batim: duxque rectae, Cn, duorum balis segmentorum
F18.
137.
Fio
BXB, iplI B X 7n 3
praecedente Demonltratione, mclacs d les poltularerie lignis , elicietur.
Ducto Plano Ba ipE BD parattelo; oltendetur, ut lupra, tructum sBa aequale
Colido BAy n y: FF, ablato uerinque BZ Da, manebit sXD aequale tori reliduo
BXDruY hoc ell, duobus BLB F BDr nY; Adeoque (subductis ucrinque
POrrO: Si duobus uccunque prans ieem Tolidum Prismatieum secetur, (sive
simile exit praecedentibus sucletum: Fructum scilicet urrisque planis incerjoetum,
iltiusimodi Prismarum seu solidorum Prismacieorum Rexregato vel Differencia (UE
res potulareri) dsclabuit.
enti BX
Duca: Si Planum BD plano B5 secetur in X; Cumptis uriusque (Cg
ZD, centris graritatis C, C; reliquisque uc prius constructis: Oltendetur Prustum
DXs, aequale solido Prismarico D X r u 7 (super eadem bale XD;) et Huteuim
Vel etiam, conpune. Relento communi torius Cemro gtaBIlatis C; PrOPICK
238. XDS Superne (quod Holctur 11B10 F) de BB lletne (quod signo = nOtCLIE)
plano balis BD ec secanti Bs incerjecta; ee Colidum prilmaticum B D r n Y su
perne (signo F nocandum:) Fric F XDS =BXB = = BD, n Y. Ouod ex
Vel, siguis esulmodi arerletur aemuattonen; senm alias sic oltendetur:
BZ B) eric 5XD BXB =BD~KV. Ouod erat octendendum.
eadem sic urriusque cum exposiia basis plano communis interlectio, sire lecus;)
d9. 13.
efig. 19c
F18.
Puta: Si Solidum quodvis Prilmaricum, cujus exposica batis aliqua plana sic BD.
38. EjuIque CC Glafa  Pet Quod cranseat Cn CC: Quod duobus utcunque
planis