0230 - National Science Conference In Peking. Tsai Tsu-chuan (R), worker-tu...Front

National Science Conference In Peking. Tsai Tsu-chuan (R), worker-turned specialist in electric lighting sources, introduces to his fellow delegates from Shanghai a new lighting source developed by himself and the Research Laboratory for Electric Light Sources of --- University headed by him. He presents the new lighting source as a gift to the current National Science Conference.