Huygens, Christiaan, Christiani Hugenii opera varia; Bd. 1: Opera mechanica

Table of figures

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[151] Pag. 276.TAB.XXXI.Fig. 2.a a m f k b e @ b a g a f b b h
[152] Fig. 1.h g k h d a b c f e l
[153] Pag. 286.TAB.XXXII.Fig. 1.A E C E E D B G
[154] Fig. 2.H N K M
[155] Fig. 4.B A D C
[156] Fig. 5.A E E C H D G B
[157] Fig. 6.A C C C C H G K E F D D D D
[158] Fig. 3.G F F B D D C D A F A E E H
[159] Fig. 7.K L R Z Y H V N S P A C E B X T M G Q O
[160] Pag. 308.TAB.XXXIII.Fig. 1.P F Q K H L R G B E C N O 3 A 2
[161] Fig. 8.R G M K N D B V C A
[162] Fig. 7.R d D G g B h H E V C u A c
[163] Fig. 2.B F G C H A K D E
[164] Fig. 4.A B G F E C D
[165] Fig. 6.T G D H B E M L N C K I S P F V R Q O A
[166] Fig. 3.A E G B D F C
[167] Fig. 5.N K F E C B A H L V W R G
[168] Fig. 9.Z R A X H C B D M K S Q G
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273171HOROLOG. OSCILLATOR. Cujus quadratum auferendo à rectangulo H G F, quod erat
11De centro
OSCILLA-
TIONIS.
{3/20} quadrati B C, fiet rectangulum G F H = {3/20} b b - {1b4/4 q q}.
Hoc
autem rectangulum, multiplex per numerum particularum
ſemiconi A B C, æquatur quadratis diſtantiarum à plano
M D O.
At quadratis diſtantiarum à plano N D æquantur,
ut in cono, {3/80} quadrati A B, ſive {3/80} a a, multiplices per
numerum particularum ſemiconi A B C.
Itaque, totum ſpa-
tium applicandum, æquabitur hic {3/80} a a + {3/20} b b - {1 b 4/4 q q}.
Unde quidem centrum agitationis invenitur in omni ſuſpen-
ſione ſemiconi, dummodo ab axe qui ſit parallelus baſi trianguli
à ſectione A B.
Notandum vero, cum figura S Z Y ſit ignotæ
prorſus naturæ, ſubcentricam tamen G H, cunei ſuper ipſa ab-
ſciſſi plano per S Y, hinc inveniri.
Nam, quia rectangulum H G F
æquale erat {3/20} b b, ſive quadrati B C, &
G F æqualis {1b b/2 q},
fit inde G H æqualis {3/10} q.
Porro, etiam ſemicylindri, & ſemiconoidis parabolici,
centra agitationis inveniri poſſunt, atque aliorum inſuper ſe-
miſolidorum;
quæ aliis inveſtiganda relinquimus.
Quemadmodum autem in figuris planis, ita & hic in ſo-
lidis figuris locum habet, quod de obliquarum centris agi-
tationis illic diximus, quæ veluti luxatione rectarum conſti-
tuuntur, quarum centra oſcillationis non differunt à centris
oſcillationis rectarum.
Sic, ſi coni duo fuerunt A B C, A F G,
22TAB. XXVII.
Fig. 1.
alter rectus, alter ſcalenus;
quorum & diametri & baſes
æquales;
hi ex vertice ſuſpenſi, vel à quibuſcunque axibus,
æqualiter à centris eorum gravitatis diſtantibus, iſochroni
erunt;
dummodo axis, unde conus ſcalenus ſuſpenſus eſt,
rectus ſit ad planum trianguli per diametrum, quod planum
baſi eſt ad angulos rectos.

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