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

Table of figures

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[Figure 131]
[Figure 132]
[Figure 133]
[Figure 134]
[Figure 135]
[Figure 136]
[137] Pag. 248.TAB. XXVIII.Fig. 1.B A E D H F I G
[138] Fig. 2.M B A E D L N H F O I G
[139] Fig. 4.O P M I B G Q N L R H A F D
[140] Fig. 5.B A D L N H I
[141] Fig. 3.a B c A C
[142] Fig. 7.D A C B E G
[143] Fig. 6.D A G B
[Figure 144]
[145] Pag. 262.TAB.XXIX.Fig. 1.P E O D C Q H M G N B S R T F
[146] Fig. 4.C A H N E P B L K I
[147] Fig. 3.N Q O P T
[148] Fig. 2.F D I C A B H K E R S G
[149] Fig. 5.L M C M E H O D P I
[150] Pag. 268.TAB. XXX.a a I L K M g N l O c k P Q T S Q V T S R f f e n l d h g b
[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
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213135HOROLOG. OSCILLATOR.
PROPOSITIO IX.
11De centro-
OSCILLA-
TIONIS.
DAtâ figurâ planâ & in eodem plano lineâ re-
ctâ, quæ vel ſecet figuram vel non, ad quam
perpendiculares cadant à particulis ſingulis minimis
&
æqualibus, in quas figura diviſa intelligitur;
invenire ſummam quadratorum ab omnibus iſtis per-
pendicularibus;
ſive planum, cujus multiplex, ſe-
cundum particularum numerum, dictæ quadrato-
rum ſummæ æquale ſit.
Sit data figura plana A B C, & in eodem plano recta
22TAB. XIX.
Fig. 5. 6.
E D;
divisâque figurâ cogitatu in particulas minimas æqua-
les, intelligantur ab unaquaque earum perpendiculares du-
ctæ in rectam E D, ſicut à particula F ducta eſt F K.
O-
porteatque invenire ſummam quadratorum ab omnibus iſtis
perpendicularibus.
Sit datæ E D parallela recta A L, quæ figuram tangat,
ac tota extra eam poſita ſit.
Poteſt autem figuram vel ab ea-
dem parte ex qua eſt E D, vel à parte oppoſita contingere.
Diſtantia vero centri gravitatis figuræ ab recta A L ſit recta
G A, ſecans E D in E;
& ſubcentrica cunei, ſuper figura
abſciſſi plano per rectam A L, ſit H A.
Dico ſummam qua-
dratorum quæſitam æquari rectangulo A G H una cum qua-
drato E G, multiplicibus ſecundum particularum numerum,
in quas figura diviſa intelligitur.
Occurrat enim F K, ſi opus eſt producta, tangenti A L
in L puncto.
Itaque primum, eo caſu quo recta E D à ſi-
gura diſtat, &
tangens A L ad eandem figuræ partem ducta
eſt, ſic propoſitum oſtendetur.
Summa omnium quadrato-
rum F K æquatur totidem quadratis K L, una cum bis to-
tidem rectangulis K L F, &
totidem inſuper quadratis L F.
Sed quadrata K L æquantur totidem quadratis E A. Et re-
ctangula K L F æqualia eſſe conſtat totidem

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