Radford's cyclopedia of construction; carpentry, building and architecture. Based on the practical experience of a large staff of experts in actual constrcution work (1909)
Johnson, Alfred Sidney, 1860-, Radford, William A., 1865- · Chicago Radford Architectural Co · leaf 67
a line passing throughthe center of the semi-circle, and cutting it in c.From c set off on this line the length of one of the Fig. 66. 1 56 PRACTICAL CARPENTRY fourths of a n. This point and the two in a nwill be the centers for the interior curves. Fig. 68 is the further working out of this… … Fig.67. Fig.68. Fig. 69 and 70 are the elementary forms ofthe tracery shown in Fig. 71. We show the method of obtaining these curvesin Fig. 69: At any point, as at A, draw a tangent,and AG at right angles to it. From A, withradius 0 A, cut the circle in B and C, and thetangent in the point F, using…
Architecture · Building
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