Cavalieri, Buonaventura, Geometria indivisibilibvs continvorvm : noua quadam ratione promota
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380360GEOMETRIÆ cylndro parallelogrãmum, AN, & in ſemibaſi columnari figura,
HBON
, quæ erit circa exem, CF, compoſita ex duabus figuris,
FBHF
, FEON, ſimilibus, &
æqualibus ei, quæ per reuolutionem
ſemibaſim
columnarem, HBON, generat;
patet ergo in hac Pro-
poſit
.
cylindrum, AN, ad ſemibaſem columnarem mediam para-
bo
icam, HBON, eſſe vt quadratum baſis, HF, ad quadratũ, FG,
{1/2}.
quadrati, GH, cum rectangulo ſub ſex quitertia, HG, & ſub, G
F
;
ſic verò etiam erit quodlibet ſolidum ſimilare genitum ex, AF,
ad
ſibi ſimilare genitum ex figura, CBHF, iuxta communem re-
gulam
, HF.
IN Prop. 43. viſa ſuperioris figura, patebit cylindrum, AN, ad
ſolidum
genitum in reuolutione ex fruſto maiori parabolæ,
EBHF
, (quod vocetur Aceruus maior parabolicus) .
ſ. ad Aceruũ,
HBEON
, eſſe vt parallelepipedum ſub, BG, &
quadrato, HF, ad
reliquum
parallelepipedi ſub, BG, &
his ſpatijs . ſ. quadrato, FG,
{1/2}.
quadrati, GH, & rectangulo ſub ſexquitertia, HG, & ſub, GF,
ab
eodem dempto 1.
parallelepipediſub, CE, & quadrato, FG;
Sic etiam erit ſolidum ſimilare quodcunq; genitum ex, AF, ad ſibi
ſimilare
genitum ex figura, CBHF, dempto ſolido ſimilari genito
ex
trilineo, BCE, iuxta communem regulam, HF.
IN Prop. 44. adiuncta ſuperioris figuræ linea, RV, parallela ipſi,
HF
, quæ, RV, ſit producta vſq;
in, X, per ſpſam ducatur pla-
num
æquidiſtans baſi, HN, quod faciet in ſemibaſi columnari, HB
ON
, communem factionem circulum, RX, habetur ergo hinc ſe-
mibaſim
columnarem mediam parabolicam, HBON, ad abſciſſum
per
circulum, RX, fruſtum, RBOX, eſſe vt parallelepipedum ſub,
BG
, &
his ſpatijs . ſ. quadrato, FG, {1/2}. quadrati, GH, & rectangulo
ſub
ſexquitertia, HG, &
ſub, GF, ad parallelepipedum ſub, BS, &
ſexquitertia
, RS, &
ſub, SV. Veluti etiam erit quodlibet ſolidum
ſimilare
genitum ex figura, CBHF, ad ſibi ſimilare genitum ex fi-
gura
, CBRV, iuxca communem regulam, HF.

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