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

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[113] Pag. 542.Fig. 1.♃
[114] Fig. 2.♃
[115] Fig. 3.♂
[116] Fig. 5.25 Mart. 1655. * a b *
[117] Fig. 7.26 Mart. * a b *
[118] Fig. 4.
[119] Fig. 6.
[120] Pag. 550.TAB. XLV III.Fig. 1.* a * b 27. Mart. 1655.
[121] Fig. 2.a * 3. Apr.
[122] Fig. 3.* a c * 9. Apr.
[123] Fig. 4.* a * c 10. Apr.
[124] Fig. 5.* a c * 11. Apr.
[125] Fig. 6.* a c * 12. Apr.
[126] Fig. 7.* c 13. Apr.
[127] Fig. 8.a * 17. Apr.
[128] Fig. 9.* 19. Apr.
[129] Fig. 10.* 20. Apr.
[130] Fig. 11.* 21. Apr.
[131] Fig. 12.* 29. Apr.
[132] Fig. 13.* 3. Maii.
[133] Fig. 14.* 6. Maii.
[134] Fig. 15.* 7. Maii.
[135] Fig. 16.* 10. Maii.
[136] Fig. 17.* 11. Maii.
[137] Fig. 18.* 12. Maii.
[138] Fig. 19.* 14. Maii.
[139] Fig. 20.* 15. Maii.
[140] Fig. 21.* 18. Maii.
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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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