Pfeiffer, Dr. Heinz G., 1164 Rose Hill Blvd., Schenectady, N.Y. 12309,
      FR 2 2266 GE Research & Development Center, Bldg. 37, room 2083,
      Schenectady, N.Y., FR 4 2211, Ext. 5 5691

      Educational Technology, electrical engineering, chemistry, physics,
      x-rays