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TREASURY DEPARTMENT UNITED STATES PUBLIC HEALTH SERVICE OFFICE OF INDUSTRIAL HYGIENE WASHINGTON, D. C. AND SANITATION December 11, 1928. Mr. O.B.Lee, President, United States Radium Corporation, 535 Pearl Street, New York, N.Y. Sir: With reference to your letter regarding a preliminary discussion before the radium conference, you are informed that it is necessary for me to be in Boston on 13th and it will be convenient for me to stop over in New York on Friday the 14th and I will call at your office on that date. You are advised that while the Surgeon General's invitation to the conference will be addressed to you, we will be glad to have Mr. Barker attend also. Respectfully, (L.R. Thompson) Surgeon in Charge. LLG