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

agy 21, 1924 Dr. Cecil K. Drinker School of Public Health Harvard University 55 Tan Dyke St. Boston, Mass. Dear Dr. Drinker, I ne glected to atart the new series of dental filma until today 80 you will therefore be delayed somewhat before receiving any of these nez films. I shall start returning the first film to you tomorrow which gives these films twenty-four hours in their prosent position. One of the last group of films was misplaced in the weighing and shipping room and was not located until yesterday This film has been in this position for three weeka and I an forwarding it to you today for your examina- tion. I an enclosing filme in a small yollow envelope upon which is marked the position, date of placing it and the date it has beon removed from its present position be- fore sending it to you. I shall take every preceution that these films shall not come in contact with any other radioactive material except that in the presonce of which it has been exposed from its position. Very traly yours UNITED STATES RADIUM CORP. HBT/h. Vice- - President