Shades and shadows, with applications to architectural details, and exercises in drawing them with the brush and pen .. (1912)
Ware, William R. (William Robert), 1832-1915 · Scranton, International Textbook Company · leaf 79
ction which is perpendicular to theaxis is a circle of the same size, and its projection upon theother plane of projection is a right line, at right angles withthe axis, whose length is the diameter of the circle. In asurface of revolution every point taken in one projectioncorresponds to two…
Shades and shadows
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