423.
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Sacred Texts Age of Reason
VIII. Botany for Painters and Elements of Landscape Painting Index
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423.
OF THE SHADOWS OF A LEAF.
The proportions of light and shade in a leaf (423-426).Sometimes a leaf has three accidents [of light] that is: shade, lustre [reflected light] and transparency [transmitted light]. Thus, if the light were at n as regards the leaf s, and the eye at m, it would see a in full light, b in shadow and c transparent.
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