Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 1: Opera mechanica
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CHRISTIANI HUGENII
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ſuarum ab axe oſcillationis, & </
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rum dividatur per id quod fit ducendo ponderum
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ſummam, in diſtantiam centri gravitatis commu-
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nis omnium ab eodem axe oſcillationis; </
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<
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xml:space
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">orietur lon-
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gitudo penduli ſimplicis compoſito iſochroni, ſive di-
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ſtantia inter axem & </
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<
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">centrum oſcillationis ipſius
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penduli compoſiti.</
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<
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</
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<
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<
s
xml:id
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echoid-s2912
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xml:space
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">Sint pondera pendulum componentia, (quorum nec figura
<
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<
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xml:space
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">TAB. XIX.
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Fig. 1. 2.</
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nec magnitudo, ſed gravitas tantum conſideretur), A, B, C,
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ſuſpenſa ab axe, qui per punctum D, ad planum quod conſpi-
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citur, rectus intelligitur. </
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<
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echoid-s2913
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xml:space
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">In quo plano ſit quoque eorum cen-
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trum commune gravitatis E; </
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<
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echoid-s2914
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xml:space
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">nam pondera in diverſis eſſe ni-
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hil refert. </
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<
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xml:space
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">Diſtantia puncti E ab axe, nempe recta E D, vo-
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cetur d. </
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<
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xml:space
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">Item ponderis A diſtantia A D, ſit e; </
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">B D, f;
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</
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">C D, g. </
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<
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xml:space
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">Ducendo itaque ſingula pondera in quadrata ſua-
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rum diſtantiarum, erit productorum ſumma a e e + b f f
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+ c g g. </
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<
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echoid-s2920
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xml:space
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">Et rurſus, ducendo ſummam ponderum in diſtan-
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tiam centri gravitatis omnium, productum æquale erit a d
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+ b d + c d . </
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<
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echoid-s2921
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xml:space
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">Unde, productum prius per hoc
<
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*
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position
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xml:space
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">Prop. 1.
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h@.</
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do, habebitur {a e e + b f f + c @ @/a d + b d + c a}. </
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">Cui longitudini ſi æqualis ſta-
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tuatur longitudo penduli ſimplicis F G, quæ etiam x vo-
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cabitur; </
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<
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xml:space
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">dico hoc illi compoſito iſochronum eſſe.</
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</
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<
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<
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xml:space
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">Ponantur enim tum pendulum F G, tum linea centri
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D E, æqualibus angulis à linea perpendiculi remota, illud
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ab F H, hæc ab D K, atque inde dimiſſa librari, & </
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<
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">in
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recta D E ſumatur D L æqualis F G. </
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<
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">Itaque pondus G
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penduli F G, integra oſcillatione arcum G M percurret,
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quem linea perpendiculi F H medium ſecabit. </
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<
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xml:space
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">punctum ve-
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ro L arcum illi ſimilem & </
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<
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xml:space
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">æqualem L N, quem medium
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dividet D K. </
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<
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xml:space
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">Itemque centrum gravitatis E, percurret ſi-
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milem arcum E I. </
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<
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xml:space
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">Quod ſi in arcubus G M, N L, ſum-
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ptis punctis quibuslibet, ſimiliter ipſos dividentibus, ut O
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& </
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<
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xml:space
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">P, eadem celeritas eſſe oſtendatur ponderis G in O, & </
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puncti L in P; </
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