My father, third-from-left at rear, in the Phi Psi fraternity paper while graduating from Swarthmore (Mechanical Engineering). Below is his Phi Kappa Psi membership card from 1935 (Pennsylvania Kappa chapter).
He was an avid photographer, and his old albums contain a few Swarthmorean treasures. Here are some faculty members he photographed for the yearbook (I am not completely sure of their provenance, although they were on an album page along with his family and college photos):
And here are a few shots of the engineering labs in 1935-36: