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Cohumbia Unitersity College of and Surgeons DEC 151930 EPIDEMIOLOGY INDUSTRIAL HYGIENE 632 WEST 1681 STREET, NEW YORK PUBLIC HEALTH ADMINISTRATION INSTITUTE OF PUBLIC HEALTH SANITARY SCIENCE Dec 15 1930. Mr. H. H. Barker, United States Radium Corp New York City, N. Y. Dear Mr. Barker, I examined Mr. Milton Lowitt on December 3rd. for radio-activity and found him negative. He was dressed in clothes which he had borrowed from a friend and the results confirmed our feeling as to the previous ex- amination. Yours Fridlin very truly, B.Thin in Frederick B. Flinn