The American house-carpenter; a treatise on the art of building, and the strength of materials (1873)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York : J. Wiley · leaf 403
Fig. 848. 508.—To find the shadow of a shelf curved in the elevation.In Fig. 348, find the points of intersection, e, e and e, as in thelast examples, and a curve traced through them will define theshadow. The preceding examples show how to find shadows when castupon a vertical plane; shadows… … Flf. 849. SHADOWS. 509.— To find the shadow cast upon a cylindrical wall by aprojection of any kind. By an inspection of Fig. 349, it will beseen that the only difference between this and the last examples,is, that the rays in the plan die against the circle, a b, instead ofa straight line.
Carpentry · Architecture
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