Letters Received to A. Roeder, June 3, 1924

June 6, 1924. Dr. Francis D. Donogime, Department of Industrial Accidents, State House, Boston, Moss. Dear Sirt- We do not bolieve that Radivun boins could occur from hendling commercial celf-Juninous material. Products of this ldnd are handled in small quantities and the amount of Radiom contained is mintte. Ordinary commercial grades used on watches, clocks, etc. contain only a fow cente worth of Radium per watch or clock. Radivun bozns occur from hondling concentrated Radium salts. It is conceivable to visualize a very large quantity of Radium Imminous Material conteining 100 Mg. or 200 Mig. or more milligrems of Radium that would canse a burn if it were concentrated in one place and some one was held in close contact with it for a considerable period of time. Even then the difrusión might be too great to cause a concentrated effect. The intensity of Radium rays diminishes inversely as the square of the distence so that for therapeutic work highly concentrated salts are now genorally packed in the smollest possible containero and inserted directly into the tissos. If when writing your letter of June 3 you had in mind a particular case of Radium buxn or bum of unicnow origin, tre should be glad to have the particulars. Yours truly, President.