Demos by PIRA

9A10 Blackboard Tools


9A20 Audio


9A30 Slide Projectors


  9A30.20Lantern slide projector with removable housing.

9A34 Film Projectors


9A36 Overhead Projectors


9A38 Video & Computer Projection


9A40 Photography


9A50 X-Y, Chart Recorders


9A60 Buildings


9A65 Museums


9A70 Resource Books


9A73 Unclassified Demonstrations


9A75 Philosophy


9A80 Films


  9A80.40Film: "Interference of photons", sound 13 min.
  9A80.40Film: "Photons", sound, 19 min..

9A85 Computer Programs