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January 10,1928. Dr. H. C. Williams, Asst. Sargent General, c Bldg., West 7th St. Washington, D.C. Dear Dr. Williams: I am advised by Dr. Frederick B. Flinn, of the Department of Physiology, Columbia University, that you have done considerable work with reference to physical conditions of people engaged in measuring radium preparation, since the públication of your article in "Public Health Reports" in 1923. Dr. Flinn further states that he is of the opinion that to date you have not published this later data. In view of litigation with which we are now concerned this type of information is of great import- anco to us, and 1 am wondering if you would feel disposed to give us a resume of the work which you have done in this connection, together with results and conclusions. Assuring you that we would very much appreciate your cooperation in this matter, we are Very truly yours, Vice President. HHBarker:RE