Description: Paper of Sidney M. Dancoff (1913-51), professor of physics (1945-51), including notes on lectures on nuclear field theory given at Urbana (1942 and Jan. 10, 1946), Chicago (summer 1945) and Notre Dame (Dec.14, 1945) and gyrodynamics (ca.1945), and the paper "Surface Resonance Absorption in an Close-Packed" Lattice."