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TREASURY DEPARTMENT UNITED STATES PUBLIC HEALTH SERVICE OFFICE OF INDUSTRIAL HYGIENE WASHINGTON, D. C. AND SANITATION Room 1-123, "O" Bldg. 16 Seventh St. S. W. Nov. 22, 1929 Mr. H. H. Barker, Vice President, NOV 231929 United States Radium Corpn. 535 Pearl St. New York, N. Y. Dear Mr. Barker: Please accept my best thanks for your letter of November 21. The information that you have sent me is exactly what I wanted. We will treat it as confidential. Yours very truly, games E. was (James E. Ives)