Warren, Samuel Edward, 1831-1909. [from old catalog] · New York, J. Wiley & sons · leaf 24
IM. SHADES AND SHADOWS. 0 from every point of the line would be totally illuminated. Theintermediate portion would be in partial shade, which wouldbecome more and more complete as the total shade should beapproached. In order, therefore, to secure both simplicity andprecision in the diagrams of…
Shades and shadows
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