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

Table of figures

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[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.
[141] Fig. 22.* 19. Maii.
[142] Fig. 23.* 20. Maii.
[143] Fig. 24.* c a * 27. Maii.
[144] Fig. 25.c * 31. Maii. a *
[145] Fig. 26.* 13. Iun.
[146] Fig. 27.* 16. Ian. 1656.
[147] Fig. 28.* 19. Febr.
[148] Fig. 29.* 16. Mart.
[149] Fig. 30.* 30. Mart.
[150] Fig. 31.* 18. Apr.
[151] Fig. 32.* 17. Iun.
[152] Fig. 33.* 19. Oct.
[153] Fig. 34.* 21. Oct.
[154] Fig. 35.* 9. Nov.
[155] Fig. 36.* 27. Nov.
[156] Fig. 37.* 16. Dec.
[157] Fig. 38.* 18. Ian. 1657.
[158] Fig. 39.* 29. Mart.
[159] Fig. 40.* 30. Mart.
[160] Fig. 41.* 18. Maii.
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163436VERA CIRCULI jor eſt quam E, & ideo A B ſeu C C major eſt quam A E,
&
igitur AE + CC minor eſt quam 2 CC: atque AC + E C
eſt ad 2 CC ut A + E ad 2 C, ſed A + E minor eſt quam
2 C;
& ideo A C + E C minor eſt quam 2 CC; proinde
A C + E C + A E + CC minor eſt quam 4 CC;
& igitur
C - A minor eſt quadruplo ipſius E - C, quod demon-
ſtrare oportuit.
PROP. XVI. THEOREMA.
SInt duo Polygona complicata A, B;
11
A # B
C # D
E # F
nempe A extra hyperbolæ ſecto-
rem &
B intra: Continuetur ſeries con-
vergens horum polygonorum complica-
torum ſecundum noſtram methodum
ſubduplam deſcriptorum, ita ut polygona extra hyperbolem
ſint A, C, E, &
c. & intra hyperbolem B, D, F & c; Dico A
+ E majorem eſſe quam 2 C.
ex prædictis manifeſtæ ſunt ſe-
quentes duæ Analogiæ, prima quoniam A, C, B, ſunt con-
tinue proportionales;
& ſecunda, quoniam C, D, B, ſunt
harmonicè proportionales;
&
22
A - C:C - B::A:C
C - B:C - D::A + C:A
proinde exceſſus A ſupra C,
hoc eſt A - C, eſt ad ex ceſſum
C ſupra D ſeu C - D;
In ratione
compoſita ex proportione A ad C &
ex proportione A + C
ad A hoc eſt in ratione A + C ad C, at A + C eſt ma-
jor quam C &
ideo exceſſus A ſupra C eſt major exceſſu C
ſupra D, eſt autem E major quam D;
& proinde exceſſus A
ſupra C multo major eſt exceſſu C ſupra E;
manifeſtum eſt
igitur A + E majorem eſſe quam 2 C, quod demonſtrare
oportuit.

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