Quarteranim1b.gif

1. The " Quarter-Circle" approximation of the equiangular spiral k = Phi 4
2. The equiangular spiral k = Phi 4 (Growth 6.854 : 1, 1.618034/quadrant)
3. For an associated sea shell spiral, see Animation Two (Haliotis Parva)

For the " Root Five rectangle ", R.C. Archibald's: Notes on the Logarithmic Spiral, Golden Section and the Fibonacci Series, see Jay Hambidge, Dynamic Symmetry 1920:16-18, 146-147. Return to Spira Solaris and the Pheidian Planorbidae


Copyright © 2002. John N. Harris, M.A.(CMNS). Last updated on July 16, 2004



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