Plate 06 of 11 · cca-1996-windmill-hill-triple-julia
Windmill Hill Triple Julia
Three Julia-type spiral arms of diminishing circles in exact three-fold rotational symmetry: about 194 circles spanning roughly 270 m across Windmill Hill near Avebury.
One arm declared once and repeated 3x at 120°: a chain of mutually tangent circles (7.6 m head shrinking by x0.92 per step to 0.4 m) along a logarithmic spiral from 13 m to ~70 m path radius over a ~215° clockwise sweep, with five satellite tufts of 3-7 small circles hanging off the outer flank; small flattened circle at the hub.