![Quarteranim2.gif](animation2.gif)
1. The growth and "rotation"of
the equiangular spiral k = Phi 4
2. The equiangular spiral k = Phi 4
(Growth 6.854 : 1, 1.618034/quadrant)
3. For the associated seashell spiral, see Animation Five (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
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