Appleton's cyclopædia of drawing, designed as a textbook for the mechanic, architect, engineer, and surveyor (1866)
Worthen, William Ezra, 1819-1897, [from old catalog] ed, Appleton, firm, publishers, New York. (1866. D. Appleton & co.) [from old catalog] · New York, D. Appleton and company · leaf 502
ying down in the same way semicircles E F corresponding to them,and drawing through E^ lines parallel to o m^, and projecting their intersec-tion with their semicircles to the corresponding sections E F on the plan, theremaining points in the curve sought may be obtained. But as this cmweis an… … Fig. 7. 321- SHADING AND SHADOWS. There will now be no difficulty in constructing the cast shadow in theinterior of a concave surface (fig. 8), formed by the combination of a hollowsemi-cylinder and a quadrant of a hollow sphere, called a niche, as weknow the mode of tracing the shadows upon each…
