Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 1: Opera mechanica
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<
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<
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">De linearum curvarum evolutione & </
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<
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">dimenſione.</
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<
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">LINEA in unam partem inflexa vocetur quam
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rectæ omnes tangentes ab eadem parte contin-
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gunt. </
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<
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echoid-s1977
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">Si autem portiones quasdam rectas lineas ha-
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buerit, hæ ipſæ productæ pro tangentibus habentur.</
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">Cum autem duæ hujusmodi lineæ ab eodem pun-
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cto egrediuntur, quarum convexitas unius obverſa
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ſit ad cavitatem alterius, quales ſunt in figura
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adſcripta curvæ A B C, A D E, ambæ in ean-
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">TAB. XI.
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Fig. 2.</
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dem partem cavæ dicantur.</
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">Si lineæ, in unam partem cavæ, filum ſeu linea
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flexilis circumplicata intelligatur, & </
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<
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">manente una
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fili extremitate illi affixa, altera extremitas ab-
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ducatur, ita ut pars ea quæ ſoluta eſt ſemper ex-
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tenſa maneat; </
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<
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">manifeſtum eſt curvam quandam
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aliam hac fili extremitate deſcribi. </
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<
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ea, Deſcripta ex evolutione.</
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