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 406
Fig. 858. 513.—To find the shadow in a recess, when the face of thewall is inclined, and the back of the recess is vertical. In Fig.353, A shows the section and B the deration of a recess of this SHADOWS. 391 kind. From b, and from any other point in the line, b a as adraw the rays, b c and a e;… … Fig. 854. 514.—To find the shadow in a fireplace. From a and fc,(Fig. 354,) cast the rays, a c and b e, and from c, erect the per-pendicular, c e; from e, draw the horizontal line, e o, and join rand d; then c e, e o, and o d, will give the extent of the shadow.
Carpentry · Architecture
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