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Culumbia Unibersity Üollege of Abpeitíans and Surgeons EPIDEMIOLOGY INDUSTRIAL HYGIENE 630 WEST 168TH STREET. NEW YORK PUBLIC HEALTH ADMINISTRATION INSTITUTE OF PUBLIC HEALTH SANITARY SCIENCE March 22, 1937 Mr. H.H. Barker UIS. Radium Corp. 535 Pearl Street New York City, N.Y. Dear Mr. Barker: I will be able to take ten girls on Monday, March 29th. Six in the morning and four in the afternoon, spaced as they were to-day. Yours sincerely, L Fleberick Flim Frederick B. Flinn. Director of Industrial Hygiene. FBF:GD