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May 20th,1931. Dr. James E. Ives, United States Public Health Service, Room 1-123, ag" Bldg. 16th Seventh St. S.W. Nashington, D.C. Dear Dr. Ives: It has been called to our attention that your work in investigating the luminous dial painting industry has been completed, and that the Clock Companies have now received a report of this work. I have written Dr. Leake asking for this report, and I an writing you to inquire whether you have completed your work with the Wulf-Hess Gamma Ray instrument loaned you some time ago, and when we may expect to have this instrument returned to us. Please be assued that while we have use for the insturment in question, we trust that you will keep it until your work has been completed. Very truly yours, Vice President. HHBarker:RE