Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 1: Opera mechanica
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HOROLOG. OSCILLATOR.
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Cujus quadratum auferendo à rectangulo H G F, quod erat
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{3/20} quadrati B C, fiet rectangulum G F H = {3/20} b b - {1b4/4 q q}. </
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autem rectangulum, multiplex per numerum particularum
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ſemiconi A B C, æquatur quadratis diſtantiarum à plano
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M D O. </
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<
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">At quadratis diſtantiarum à plano N D æquantur,
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ut in cono, {3/80} quadrati A B, ſive {3/80} a a, multiplices per
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numerum particularum ſemiconi A B C. </
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<
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tium applicandum, æquabitur hic {3/80} a a + {3/20} b b - {1 b 4/4 q q}.</
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">Unde quidem centrum agitationis invenitur in omni ſuſpen-
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ſione ſemiconi, dummodo ab axe qui ſit parallelus baſi trianguli
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à ſectione A B. </
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">Notandum vero, cum figura S Z Y ſit ignotæ
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prorſus naturæ, ſubcentricam tamen G H, cunei ſuper ipſa ab-
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ſciſſi plano per S Y, hinc inveniri. </
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<
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">Nam, quia rectangulum H G F
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æquale erat {3/20} b b, ſive quadrati B C, & </
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">G F æqualis {1b b/2 q},
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fit inde G H æqualis {3/10} q.</
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centra agitationis inveniri poſſunt, atque aliorum inſuper ſe-
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miſolidorum; </
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lidis figuris locum habet, quod de obliquarum centris agi-
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tationis illic diximus, quæ veluti luxatione rectarum conſti-
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tuuntur, quarum centra oſcillationis non differunt à centris
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oſcillationis rectarum. </
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">Sic, ſi coni duo fuerunt A B C, A F G,
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Fig. 1.</
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alter rectus, alter ſcalenus; </
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æquales; </
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">hi ex vertice ſuſpenſi, vel à quibuſcunque axibus,
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æqualiter à centris eorum gravitatis diſtantibus, iſochroni
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erunt; </
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<
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">dummodo axis, unde conus ſcalenus ſuſpenſus eſt,
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rectus ſit ad planum trianguli per diametrum, quod planum
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baſi eſt ad angulos rectos.</
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