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December 13th, 1928. H. S. Cumming, Surgeon General, U. 8. Public Health Service, Treasury Department, Washington, D. C. Dear Dr. Cunming: Please accept our thanks for your letter of December llth, extending an invitation to attend the conference in Washongton on December 18th,1928, at 10:30 a.M., on the subject of industrial health hazards to radium painters. I shall attend this meeting and have with me Mr. H. H. Barker, our Fice President, who is also our chief Chemist and Physicist. Very truly yours, President. CBLee:RB