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 269
the equation, in which AB = s, ^(^ks-.y-[ks-|y=^j{hi+.y-{h|y-n. Suggestion. — For an illustration of stilted arches see Fig. 233 inwhich AH represents the n of Ex. 25. Is there any limit to thevalue of n in a figure of the general type suggested in Ex. 25 ? 256 GOTHIC TRACERY: POINTED FORMS 276.…
Geometry · Decoration and ornament
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