Huygens, Christiaan, Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica

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134 70[Figure 70]
VERA
CIRCULI ET HYPERBOLÆ
QUADRATURA
AUTHORE
JACOBO GREGORIO.
LECTORI GEOMETRÆ
SALUTEM.
MEcum aliquando cogitabam, ami-
ce Lector, num Analytica cum
ſuis quinque operationibus eſſet
ſufficiens, &
generalis methodus
inveſtigandi omnes quantitatum
proportiones, ut in initio ſuæ Ge-
ometriæ affirmare videtur Car-
teſius;
ſi enim ita eſſet, poſſibile foret ejus ope to-
ties decantatam circuli quadraturam exhibere:
cumque hæc mente revolverem, facile percepi ex
hactenus repertis circuli proprietatibus nullam poſſe
analyſin inſtitui tali ſtructuræ inſervientem:
dein-
de mihi alias quærenti incidit in mentem hujus ſe-
cunda, prima enim in circulo vulgo eſt cognita:

ex hiſce percepi ſeriem polygonorum convergentem,
cujus terminatio eſt circuli ſector;
ubi ſtatim

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