. Radium . General Office* and Radium Research Laboratory,Standard Chemical Company, Pittsburgh. Pa. Miners of Uranium and Vanadium Ores,and Producers of Radium Standard Chemical Company. ,^:iWJHH»^ United States Bureau of Standards Measurement APPLICATORS Standard andSpecial Designs Inquiries Solicited RADIUM CHEMICAL COMPANY GENERAL OFFICES AND LABORATORIES Pittsburgh, Pa. New York Boston 501 Fifth Arenue. Little Building. Chicago San Francisco Marshall Field Annex Building. 908 Butler Building. LondonWatson & Sons, (Electro-Medical) Ltd,196 Great Portland Street. W. I.

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