Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica
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CHRISTIANI HUGENII
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hinc manifeſtum eſt. </
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quadratis A X & </
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<
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H X & </
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A X. </
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<
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xml:space
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H & </
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<
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<
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<
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<
s
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<
s
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">ſit R K
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parallela D A vel B C, eique occurrant productæ F A,
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B A, H E, in punctis M, Q, K: </
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<
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producatur ad P.</
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<
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lela D A, erit & </
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</
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<
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">angulus autem B A R rectus, quum ſit in ſemicirculo,
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nam tres hæ æquales ſunt D B, D A, D R. </
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tem ſunt B Q, H E K, ergo & </
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H P æqualis P K. </
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drato A E unà cum rectangulo H E K . </
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tum A H æquale eſt etiam quadratis ex G ſeu A E, & </
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A B. </
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ad A B ſeu Q A ita eſt E M ad M A: </
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ita A F ad F E. </
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proinde E A ad A M ut E A ad E F. </
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tur E F ipſi A M; </
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ipſi A E, hoc eſt, datæ G. </
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<
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Fig. 4.</
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tera B D, B C; </
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ctam N F tranſeuntem per angulum A, quæque æqualis ſit
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ipſi G.</
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quit, uti ſupra quoque dictum fuit. </
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ctum eſt quod quærebatur. </
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Erit in ſchemate adjecto, ſicut propoſitum eſt, conſtru-
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ctio & </
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