Letters Sent to Cecil K. Drinker, May 21, 1924

may 21, 1/224 UNITED STATER Dr. Cecil X. Drinker COAP School of Public Health Harvard University 55 Tan Dyke St. Boston, Mass. Dear Dr. Drinker, I neglected to start the new series of dental films 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 present 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 weeks and I am forwarding it to you today for your examina- tion. I nm enclosing filma in a small yellow envelope upon which is marked the position, date of placing it and the date it has been removed from its prosent position be- fore sending it to you. I shall take every precaution that these films shall not come in contact with any other rad ioactive material except that in the presence of which it has been exposed from its position. Tery truly yours UNITED STATES RADIUM CORP. HBT/H. Vice-President