Viviani, Vincenzo
,
De maximis et minimis, geometrica divinatio : in qvintvm Conicorvm Apollonii Pergaei
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<
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E D, vel G D ſit _MAXIMA_ ex E, vel G ducibililium, patet: </
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<
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circulus ex radio H D cadit totus extra Ellipſim A B C D, ſed in
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mi huius.</
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lo, cuius radius H D, ipſa E D, vel G D eſt _MAXIMA_, cum in ea ſit cir-
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culi centrum: </
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<
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">quapropter E D, vel G D eò magis erit _MAXIMA_ ad in-
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ſcriptam Ellipſim A B C D. </
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<
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<
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http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/QN4GHYBF/figures/0194-01
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D Ellipſis circa minorem axim
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B D, in quo infra verticem B
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ſumptum ſit punctum E, quod
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à vertice diſtet per interuallum,
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quod primò ſit æquale dimidio
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recti lateris axis B D. </
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<
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eſſe _MAXIMAM_ ex E ducibiliũ
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ad Ellipſis peripheriam ABCD.</
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<
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">Si enim facto centro E, cum
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radio E B circulus deſcribatur
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B F, ipſe cadet totus extra
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roll. 20. 1.
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huius.</
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lipſim; </
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pſis peripheriam ducẽtur, pręter
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ad B, minores erunt, quàm quę
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ex eodem E, ad circuli circum-
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ſcriptam circumferentiam, hoc
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eſt minores ipſa E B. </
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E B erit _MAXIMA_, &</
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<
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<
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">Si verò diſtantia à vertice B,
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maior fuerit eodem recti dimi-
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dio, qualis eſt G B: </
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<
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circulo B F, ipſa G B, in qua
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eſt circuli centrum, _MAXIMA_ ad eius peripheriam ducibilium, eò ma-
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gis _MAXIMA_ erit ad inſcriptæ Ellipſis peripheriam A B C D.</
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<
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">Quod autem in eadem tertia figura reliquum minoris axis ſegmentum
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E D, vel G D, ſit _MINIMA_ ex E, vel G ducibilium ad Ellipſis periphe-
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riam A B C D, ſic manifeſtum fiet.</
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<
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<
s
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xml:space
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">Quoniam circulus ex radio H D cadit totus intra Ellipſim A B C
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mi huius.</
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ſed ad peripheriam circuli ex radio H D ipſa E D, vel G D eſt _MINIMA_,
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cum in ea non ſit circuli centrum: </
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<
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pliùs erit _MINIMA_ ducibilium ad eidem circulo circumſcriptam Ellipſis
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peripheriam A B C D. </
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<
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">HOC loco animaduertendum eſt, ſemper in Ellipſi circa minorem
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axim, tertiæ figuræ, interuallum B E ſemi-rectis lateris, omnino
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excedere minorem ſemi-axim B H, (cum integrum rectum latus excedat
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integrum minorem axim; </
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<
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<
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fuit) ac idem punctum E cadere poſſe in quocunq; </
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<
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