Cavalieri, Buonaventura, Geometria indivisibilibvs continvorvm : noua quadam ratione promota

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268248GEOMETRIÆ T CFEY, regula, TY, ſunt vt rectangulum ſub, FN, & tripla,
N H, .
i. vt, {3/4}, quadrati, FH, ad rectangulum ſub, FI, & ſub, I
H N, .
i. vt totum quadratum, FH, ad rectangulum ſub, FI, &
ſub ſexquitertia ipſarum, IHN, .
i. in circulo, vt quadratum, AP,
165[Figure 165] (quod æquatur quadrato, FH, ) ad
idem rectangulum ideſt ſumpta, FI,
communi altitudine, vt parallelepipe-
dum ſub, FI, &
quadrato, AP, . i.
vt parallelepipedum ſub, AP. vel, L
G, &
parallelogrammo rectangulo
ſub, FI, ſiue, AL, &
, LG, ad pa-
rallelepipedum ſub, FI, &
ſub baſi
rectangulo ſub, FI, &
ſub ſexquiter-
tia, IHN, ergo ex æquali omnia
quadrata figuræ, LCFE G, dem-
ptis omnibus quadratis trilineorum,
CLT, YGE, regula, FI, ad omnia
quadrata portionis, TCFE Y, regu-
la, TY, erunt vt cylindricus ſub, M
I, &
ſub portione, TCFE Y, vna
cum, {1/6}, cubi, TY, ad parallelepipe-
dum ſub, FI, &
ſub rectangulo ſub,
F I, &
ſexquitertia, IHN; & hoc in
circulo.
In ellipſi autem eadem habebunt
rationem compoſitam exiam dicta ratione .
ſ. ex ratione cylindrici
ſub, MI, &
ſub portione, TGFE Y, vna cum ea parte cubi, vel
parallelepipedi ſub, RV, &
rhombo, RZ, ad quam eiuſdem, {1/6}, ſit
vt quadratum, CE, ad quadratum, FH, ad parallelepipedum,
ſub, LG, &
parallelogrammo, AG, & ex ratione quadrati, FH,
ad rectangulum ſub, FI, &
ſub ſexquitertia ipſarum, IHN; quas
duas rationes in circulo in vna reſoluimus, quia in eo quadratum,
F H, æquatur quadrato, AP, quod cum in ellipſi non verificetur,
ideò has duas rationes componentes pro ipſa ellipſi retinuimus;
quod oſtendere oportebat.
THEOREMA XXVII. PROPOS. XXVIII.
IN eadem ſuperioris figura oſtendemus, tum in circulo,
tum in ellipſi, omnia quadrata figuræ, LCFEG, dem-
ptis omnibus quadratis trilineorum, CLT, YGE,

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