Barrow, Isaac
,
Lectiones opticae & geometricae : in quibus phaenomenon opticorum genuinae rationes investigantur, ac exponuntur: et generalia curvarum linearum symptomata declarantur
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[Figure 31]
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[Figure 32]
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[Figure 33]
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[Figure 34]
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[Figure 35]
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[Figure 36]
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[Figure 37]
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[Figure 38]
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[Figure 39]
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[Figure 40]
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& </
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<
s
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<
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Nam (ut ſuprà) eft CA. </
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<
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<
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xml:space
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<
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<
s
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">quare dividendo erit CA
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- CK. </
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<
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<
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xml:space
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<
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<
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xml:space
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2 AC x CQ + CNq. </
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<
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xml:space
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<
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xml:space
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:</
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<
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xml:id
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<
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<
s
xml:id
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xml:space
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">hoc eſt, (ob CNq = 2 AC x E.) </
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<
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+ 2 AC x E. </
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<
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<
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xml:space
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<
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<
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<
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<
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AC. </
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<
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xml:space
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<
s
xml:id
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xml:space
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">quare dividendo CQ. </
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<
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xml:space
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">E:</
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<
s
xml:id
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xml:space
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<
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<
s
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F - E = CQ: </
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<
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<
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<
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NK, RL axem ſecent punctis K, L; </
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<
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<
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<
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xml:space
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ACq. </
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<
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<
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<
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<
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<
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- ACq. </
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<
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">& </
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<
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<
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<
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<
s
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">erit ex æquo
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perturbatè CK. </
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<
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<
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</
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<
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<
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<
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</
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<
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decuſſare.</
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<
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<
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tium AN, AR, AX reflexi cum axe conveniant punctis K, L, M;
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</
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<
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">dico ſpatium LM, obliquiorum occurſibus interjectum, majus eſſe
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ſpatio LK, quod rectiorum continetur occurſibus. </
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<
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monſtratis conſtat eſſe ANq + AXq &</
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<
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<
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<
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re ANq + AXq - 2 ACq &</
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ANq. </
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<
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ACq. </
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<
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</
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<
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<
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<
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">& </
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<
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<
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<
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<
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fatior evadit.</
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<
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<
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">Quidnì demùm rurſus ex his inferatur, viſibilis A imaginem
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@irca reflexorum metam Z, oculo uſpiam in AZ conſtituto, appa-
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rere?</
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<
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lo uſpiam in ZB collocato confuſiorem apparentiam objici; </
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