Bošković, Ruđer Josip
,
Abhandlung von den verbesserten dioptrischen Fernröhren aus den Sammlungen des Instituts zu Bologna sammt einem Anhange des Uebersetzers
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Ahhandlung
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müſſen auch die Winkel C F H, C H F einander
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gleich werden, weil ſte der zwey itzt angeführ-
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ten Mitwinkel ſind, und folglich bekommen die
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ihnen entgegen geſetzten zwey Schenkel C H,
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CF eine gleiche Länge.</
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<
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ſind 1
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die Winkel M F H, M H F; </
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M F N,
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M H N; </
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N F H, N H F gleich; </
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jedweder des erſten Paares = {1/2} c, des zweyten
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= {c + r/2}, des dritten = {1/2} r.</
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ſchon (155) bewieſen werden, daß ſie ein-
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ander gleich ſind; </
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Unterſchied zwiſchen den erſten, und zweyten.
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">Beynebens iſt, der 1 Formel (145) gemäß,
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das erſte Paar = c; </
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">und vermöge der 2 For-
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mel, das zweyte Paar = c + r, mithin muß
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das dritte Paar dem r gleich werden.</
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<
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">Wir haben demnach in gegenwärtigen
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Umſtänden x = y = {1/2} c, u = z = {c + r/2},
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folglich m = {ſin. </
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">{1/2} c}, weil nämlich die 3
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Formel (145) m = {ſin. </
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<
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ähnliche Werthe für zwey verſchiedene </
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