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

Table of figures

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[161] Fig. 42.* 19. Maii.
[162] Fig. 43.* 17. Dec.
[163] Fig. 44.* 18. Dec.
[164] Fig. 45.* 27. Dec.
[165] Fig. 46.* 11. Mart 1658.
[166] Fig. 47.* 16. Mart.
[167] Fig. 48.* 23. Mart.
[168] Fig. 49.* 3. Apr.
[169] Fig. 50.* 10. Nov.
[170] Fig. 51.* 16. Ian. 1659.
[171] Fig. 52.12. Febr. *
[172] Fig. 53.* 24. Febr.
[173] Fig. 54.25. Febr. *
[174] Fig. 55.14. Mart. *
[175] Fig. 56.16. Mart. *
[176] Fig. 57.* 21. Mart.
[177] Fig. 58.* 22. Mart.
[178] Fig. 59.26. Mart. *
[179] Pag. 574.TAB. XLIX.Fig. 2.
[180] Fig. 1.C K O B H N G M S * F D A L E
[181] Fig. 3.E C D A * B
[182] Fig. 4.P Q O N M L * C R
[183] Fig. 5.C * V S X T Y
[184] Fig. 6.
[185] Fig. 7.
[186] Pag. 580.TAB. L.Fig. 2.R ♈ L D I T A N ♋ H G E P F K C Q O B M S
[187] Fig. 3.
[188] Fig. 4.N Q F C P L E A M H O D f
[189] Fig. 1.B A
[Figure 190]
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165438VERA CIRCULI ſupra A; eſt igitur D major quam C, quod demonſtrare
oportuit.
PROP. XIX. THEOREMA.
IIsdem poſitis; ſit inter A & B media harmonica E. dico
C majorem eſſe quam E.
ex hujus 13, D eſt ad C ut C ad
E, ſed D major eſt quam C;
& ideo C major eſt quam E,
quod demonſtrare oportuit.
CONSECTARIUM.
Ex duabus præcedentibus manifeſtum eſt D majorem eſſe
quam E, hoc eſt mediam arithmeticam inter duas quantita-
tes inæquales majorem eſſe media harmonica inter eaſdem.
PROP. XX. THEOREMA.
SInt duo polygona complicata
11
A B # A
C D # C
E F # G
K L # H
Z # X
A, B, nempe A intra circuli
vel ellipſeos ſectorem, B extra.
continuetur ſeries convergens ho-
rum polygonorum complicato-
rum ſecundum methodum no-
ſtram ſubduplam deſcriptorum;

ita ut polygona intra circulum ſint A, C, E, K, &
c, & ex-
tra circulum B, D, F, L, &
c; ſitque ſeriei convergentis ter-
minatio ſeu circuli vel ellipſeos ſector Z.
dico Z majorem
eſſe quam C una cum triente exceſſus C ſupra A.
ſit exceſſus
G ſupra C quarta pars exceſſus C ſupra A, &
exceſſus H
ſupra G quarta pars exceſſus G ſupra C;
continueturque
hæc ſeries in infinitum, ut ejus terminatio ſit X.
Exceſſus
C ſupra A minor eſt quadruplo exceſſus E ſupra C;
& ideo
exceſſus E ſupra C major eſt exceſſu G ſupra C, eſt ergo
E major quam G.
deinde exceſſus E ſupra C minor eſt qua-
druplo exceſſus K ſupra E, &
ideo exceſſus G ſupra C mul-
to minor eſt quadruplo exceſſus K ſupra E, eſt igitur

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