A source book of problems for geometry, based upon industrial design and architectural ornament (1912)
Sykes, Mabel, 1868-, Slaught, H. E. (Herbert Ellsworth), 1861-1937, Lennes, N. J. (Nels Johann), 1874- · Boston, Allyn and Bacon · leaf 319
G E G Fig. 273a. — From Canterbury Cathedral. ^ Sturgis (1) pp. 273, 330. 306 TRUSSES AND ARCHES 6. Show that the equilateral Gothic arch may be derived from aseries of intersecting semicircles. (See Fig. 273a.) Suggestion. —Frore ^ABC, CDE, EFG ■■■ etc. equilateral. … Fig. 273(>. 7. Show that designs like those in Figs. 273 and 2736 may beconsidered as based on a series of intersecting equilateral arches, oron a series of intersecting semicircles.
Geometry · Decoration and ornament
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