Hambidge, Jay, 1867-1924 · New Haven : Yale University Press · leaf 40
DYNAMIC SYMMETRY 24 fourth of a root-four outside and a root-five inside, one-fifth of a root-five out- side. And a reciprocal to any rectangle is obtained by drawing a perpendicular from one corner. … Fig. 10. The whirling square rectangle and the root-five rectangle are placed within a square thus: Fig. i \b. Fig. i ia. The square is first bisected by the line AB, to obtain a root-four rectangle or two squares. From the diagonal of this rectangle CB, unity, or BE, is subtracted to determine the…
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