Sacred Texts Age of Reason Index
III. Six Books on Light and Shade Index
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The law of the incidence of light.The edges of a window which are illuminated by 2 lights of equal degrees of brightness will not reflect light of equal brightness into the chamber within.
If b is a candle and a c our hemisphere both will illuminate the edges of the window m n, but light b will only illuminate f g and the hemisphere a will light all of d e.
