A treatise on architecture and building construction (1899)
International Correspondence Schools · Scranton, The Colliery engineer co. · leaf 531
dthe semicircular shape of the window head demands specialconstruction. 65. To unfold or develop this semicircular window head,we proceed as follows: Draw a line a a from the insideedges of the pulley stiles, and from each end of it erect the 50 JOINERY. 10 perpendiculars a b, which will be… … Fig. 31. and (ib as a radius, draw the semicircle bfb, which will bethe elevation of the inside line of the window head. Nowdivide one-half of this semicircle bfb into any number ofc(|ual parts, by points //, v, w, x, etc., and from these pointslet fall perpendiculars to an, as shown at x I, zuj\…
Architecture · Building
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