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 265
The formulae for theirsolution are given in Exs. 9, 28, and 25 in § 275. Theform of this type shown in Figs. 229 and 230 is the com-mon design of early geometrical windows. Its use isuniversal. Figure 193a shows an illustration from St.Louis. By repetition of this design, windows of fourand eight… … Q B
Geometry · Decoration and ornament
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