Cavalieri, Buonaventura
,
Geometria indivisibilibvs continvorvm : noua quadam ratione promota
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GEOMETRIÆ
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xml:space
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<
s
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xml:space
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">ab eodem rectangulo, AR, dum ſit reuolutio ſemel circa, T
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X, & </
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<
s
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">ſemel circa parallelam, AC, ad anulos latos ellipticos altera
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parte ſtrictiores genitos in reuolutionibus ab ellipſi, BDMG, ha-
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bere eandem rationem ſcilicet quam habet, AR, ad ellipſim, BDM
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G, & </
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<
s
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xml:space
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">ideò inter ſe dictos anulos eſſe, vt dictas faſcias, dictæ autem
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faſciæ ſolidæ cylindricæ ſunt, vt reſidua, demptis à quadratis ſemi-
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diametrorum baſium integrorum cylindrorum quadratis ſemidiame-
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trorum baſium cylindrorum, quas dictæ faſciæ complectuntur, & </
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<
s
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ideò dicti anuli inter ſe eandem rationem habebunt, quam dicta qua-
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dratorum reſidua.</
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s
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">IN Corollario huius tandem dicitur, quòd ſi, BDMG, non
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eſſet ellipſis, tum in Schemate huius, tum Theorematis antece-
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dentis, ſed alia vtcunque ſigura habens tamen prædictas conditiones
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ibi appoſitas, quod de eadem dicta quoque de ellipſi, BDMG, ve-
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riſicarentur, noſque hic colligimus, quod omnia ſupradicta æquè,
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ac deſolidis genitis ab ellipſi, BDMG, de genitis abipſa figura pa-
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riter veriſicarentur. </
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<
s
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xml:space
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">Poſſumus autem vocare ſolida deſcripta per
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reuolutionem factam circa, CR, à ſigura, BDMG. </
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<
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xml:space
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">Solida anu-
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laria ſtricta altera parte latiora: </
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xml:space
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">quæ verò ſiunt ab eadem per reuolu-
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tionem circa, TX. </
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<
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xml:space
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">Solida anularia lata altera parte ſtrictiora.</
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xml:space
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</
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">bt ſi ſecentur
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planis parallelis, ad axem, circa quem ſit reuolutio, exiſtentibus
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rectis, quam inter ſerationem babeant reſecta ſegmenta. </
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<
s
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xml:space
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">Item reſtat
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contemplandum ſolidum, quod naſceretur ex reuolutione dimidiæ elli-
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pſis circa non axem, ſed diametrum, vel diametro parallelam; </
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<
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xml:space
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">quæ vo-
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luta circa diametrum ſolidum deſcribit referens ſiguram Pyri; </
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<
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xml:space
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">circa,
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berò parallelam diametro portionem maiorem ab ellipſireſecantem, de-
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ſcribit quoddam ſolidum latius ex vna parte, quam ex alia, referens ſi-
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guram Mali paradiſi, vt vulgò dicitur, circa berò parallelam </
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