Barrow, Isaac
,
Lectiones opticae & geometricae : in quibus phaenomenon opticorum genuinae rationes investigantur, ac exponuntur: et generalia curvarum linearum symptomata declarantur
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&</
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<
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<
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<
s
xml:id
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xml:space
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<
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<
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<
s
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<
s
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<
s
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echoid-s5973
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xml:space
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&</
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<
s
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<
s
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<
s
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<
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<
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<
s
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<
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xlink:label
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xml:space
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">Fig. 140.</
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I &</
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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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<
s
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xml:space
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<
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<
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<
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KB. </
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<
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<
s
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xml:space
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<
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<
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<
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xml:space
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CB. </
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<
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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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<
s
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<
s
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xml:space
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centro ſemper vicinius eſt quàm Z.</
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<
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<
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caſus transferri poſſint, habentur indè determinati refractorum limites,
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hoc eſt apparentia radiantium punctorum A loca, reſpectu oculi cen-
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trum habentis in axe AC ſitum; </
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<
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culcatam.</
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<
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cavas) peculiare venit obſervandum cùm ſit CB = CR, omnes
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refractos in ipſo puncto Z (ut ſuprà definito) retrò protractos con-
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gregari. </
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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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dendo AC. </
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<
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<
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<
s
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<
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adſumptum connexis AN, ZN, erit ZN. </
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<
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<
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CZ. </
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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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à centro infinitè diſtare; </
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<
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<
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erit BZ = CZ; </
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<
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infinitè.</
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<
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<
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<
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143.</
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ſint puncta Z, ζ, erit AC. </
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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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tam AC. </
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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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<
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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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<
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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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Cζ. </
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<
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<
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<
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<
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xml:id
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<
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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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C Z.</
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