Van de Graaf Generator at University of British Columbia (23/11/49): several shots of scientists testing Geiger counters to detect presence of gamma rays. CU of dial reacting, of various other tests being carried out on elements of generator. CU of operator, of McLeod mercury gauge. Shot of three-storey high Van de Graaf generator without its casing. Shots of control panel, of operator carrying out various tests. Shots of electric spark. Shots of Dr Gordon Shrum, head of University of British Columbia Physics Department, of TW Mouat, engineer in charge of construction at right. Sequence on technicians lowering sections of casing around generator, bolting sections together. Exterior MLS of University of British Columbia physics building.