Gravitation (A+15)

  A+15+0 The Cavendish experiment: Model and actual apparatus to show.
  A+15+1 Film loop: "The Cavendish experiment", 4:25 min.
  A+15+30 Film: "The law of gravitation "(Feynman), sound, 56 min.
  A+15+50 Drawing ellipse on chalkboard