Given by the Pohlad Family Foundation

The Foucault pendulum at Puget Sound is located in the center of the spiral staircase in Harned Hall’s main lobby. Hung from the third-floor ceiling, the cable pendulum is suspended over a base with inlaid wood in a beautiful Penrose pattern. The pattern is named for British physicist and mathematician Roger Penrose, who, in the 1970s, developed sets of shapes to tile a surface in regular but nonrepeating patterns. The university’s pendulum base was designed and constructed by Professor of Physics Alan Thorndike.