Warren, Samuel Edward, 1831-1909. [from old catalog] · New York, J. Wiley & sons · leaf 168
n xiii … SHADES AND SHADOWS. 101 The construction of other points, as, for instance, those on thegreat circle, perpendicular to the ground line, is left for thestudent. Having now eight points of shade, the curve of shade maybe sketched. To avoid confusion, only the vertical projectionof the shade is shown,…
Shades and shadows
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