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November 12, 1943 Dr. F. B. Flinn, Columbia University, DeLamar Institute of Public Health, 600 West 168th Street, New York City Dear Dr. Flinn:- We have your letter of November 10th and are pleased to say that for approximately the past three weeks we have been experimenting with. sulphonate oil as a cleaning fluid for the hands of our dial painters. Some of the girls seem to dislike the idea, but we believe that in a short period of time everyone will be accustomed to the procedure and no objections will be interposed. We will let you know later on how successful we are in introducing the new cleaning method. You will also then be in a position to determine its effectiveness by actual measure- ments. Thanking you for the suggestion, we are, Very truly yours, President CBLee:rkh