The American house carpenter: a treatise upon architecture, cornices and mouldings, framing, doors, windows and stairs. Together with the most important principles of practical geometry (1852)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York, J. Wiley · leaf 277
cast hy a shelf, which is wider atone end than at the other. In Fig. 310, A is the plan, and Bthe elevation. Find the point, d, as in the previous example, andfrom any other point in the front of the shelf, as a, erect the perpen-dicular, a e; from a and e, draw a h and e c, at the proper angle,and… … Fig. 311. 411.—To find the shadow of a shelf having one end acute orobtuse angled. Fig. 311 shows the plan and elevation of anacute-angled shelf. Find the line, e g, as before ; from a, erectthe perpendicular, ab ; join 6 and e; then b e and e g will definethe boundary of shadow.
Carpentry · Architecture
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