From Parallel lines, waves, columns: Centers Box Counter Rotate, Trade and Spread; ends/outsides 1/2 Zoom, then Hinge, then (Phantom) Column Circulate 2 places. This is an expansion of the original which was defined as starting from columns only. (Disperse the Line used before: B. 2277.)
This definition is from SCVSDA Note Service by Bill Davis.
It is provided here for informational and educational purposes only.