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 282
FiL. 32^. 420.— To find the shadow in a recess, when the face of thewall is inclined, and the hack of the recess is vertical. In Fig322, A shows the section and B the elevation of a recess of this SHADOWS. 265 kind. From h, and from any other point in the Hne, h a, as a,draw the rays, h c and a e;… … mmi, Fig. 323. 421.— To find the shadow in a fireplace. From a and h,{Fig. 323,) 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 oand d; then c e, e o, and o d, will give the extent of the shadow.…
Carpentry · Architecture
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