Letters Sent to C.H. Granger, June 4, 1925

June 4, 1925. Mr. C. H. Granger, c/o Waterbury Clock Company, Waterbury, Conn. My dear lir. Granger: I have your letter of June 1 and will give you below as nearly as I can the information for which you asic. One of our former operators in the Application Department at Orange has brought a silt against us for damages to cover injury which is alleged to have been essued. by employment in our factory. The case is apparently unique and is coming up in a State court because the State Compensation Board denied compensation and consequently the insurance company, the Amoricam Matual of Boston, refuses compensation. Her condition is a serious jau necrosis and very stubborn. It developed following the extraction of a tooth or teeth about a year ago and has not yet, I understand, been brought under control. Serious jay necrosis is not a very common condition although minor necrosis is not at all raxe. I have been told that it has been browght about by just the use of peroxide of hydrogen after tooth extraction. Carlough, the plaintiff, in this action, developed necrosis soon after leaving our employ. Shortly before that, we heard of another former operator who had developed a similar condition, but she had not worked for us for about four years. lie were also told that two others who had left us about tiro years earlier had a similar complaint. Radium luminous material, as you undoubtedly lonow, is made of a specially prepared sinc sulphide which is insoluble except in hot acid. It contains no phosphorus or other ingredients Jcom to be poisonous. Animal tests that we have hnd made using Undark in much stronger doses than could be absorbed by any operators, have not produced jaw necrosis or any similer condition. Radium takon internally is Imoim to finally locate in the bones, particularly the long bonos, and work out of minhals or homans slowly. We are having additional work done with animals right now, but I understand there has been no apparent change in guínea pâgs that have had Undark applied to their guns for several weeks. Later these animols will be sacrificed and conclusions dramm. Radium and other radioactive elements are extensively used internally in Europe and in some neasure in this country in the troatment of various conditions. They are administered usually by intravenous (Continued)