Larson discusses scalar motion using the balloon analogy, and how flies on the surface of the balloon represent two types of motion: dead files are like photons, carried by the expansion of the balloon, and living flies are coordinate motion, walking across the surface. An interesting lecture; includes Q&A by Paul deLespinasse, Frank H. Meyer and Ronald Satz.

Ronald Satz's presentation on quarks, charges and gravitation (missing part of lecture; tape ended before Ron did).

Frank H. Meyer discusses crystallography and the solid state of matter.