Letters Received to H.B. Viedt, May 14, 1924

HARVARD UNIVERSITY SCHOOL OF PUBLIC HEALTH DEPARTMENT OF PHYSIOLOGY 55 VAN DYKE STREET BOSTON, MASSACHUSETTS May 14, 1924. Mr. H. B. Viedt, United States Radium Corporation, 422 Alden Street, Orange, N. J. Dear Mr. Viedt: I am sending you today a set of 23 more dental films. Please have Dr. Lehman and his assistant, Miss Smith, and Victor Roth each carry two of these continuously, each returning one film to me at the end of one week and the second film at the end of two weeks. Please place another film in Miss Hall's room, returning it at the end of a week. The cover of the last film from her room was torn when we examined the film. I would like to have you place the 14 remaining films in the painting room and return one to me daily, beginning at the end of 24 hours, until they are used up. Be sure to enclose each film in an envelope indicating the place where it has been and the duration of exposure. Very truly yours, Cit K.Dunke Cecil K. Drinker, M.D.