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TREASURY DEPARTMENT BUREAU OF JPL/EMW THE PUBLIC HEALTH SERVICE JUN 1 1931 OFFICE OF INDUSTRIAL HYGIENE WASHINGTON, D. C. AND SANITATION Room 1-123, "C" Bldg., 16 Seventh St., S.W. May 29, 1931 Dr. H. H. Barker, United States Radium Corporation, 535 Pearl St. , New York, N. Y. Dear Dr. Barker: Enclosed is the carbon copy with changes to date. I am also sending a copy to Mr. Ingraham with the request that he send his to Mr. Granger. Would you be good enough to let Mr. English see this when you have read it? I should greatly appreciate any further suggestions that you might be good enough to make. Our conference in New York was not only very pleasant but was very helpful. With best regards, Sincerely jo Phole (J. P. Leake) Senior Surgeon in Charge