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COPY IAYO GLILIC Rochoster, June 11,1925. Dr. Froderick n. Flinn. 437 N. 50th St., Hew York City. Dear Dr. Flinn: Your letter of the 5th inst. is at hand. I em reforring your question to Dr. Dowing for more detailed reference. It is true that tre leeep close watch of the technicions that are handling radium. However, in rogard to the blood studies we have had no deviation from the normal of any of our people who are, exposed to radium enanations. of course, that is the state of affaira that tro alugys hope to mintain. Dr. Bowing esn give you further reference to various reports that could be used as controls in your stulies. He also sugrests that euch effects might be due to poisoning with other substances used in the proparation in the "radio-Lite" dials tather than to the rays themolves. A$ any rate wr shall both be gind to 10now the outcome of your study of this occupational disease. Yours vory truly, (signed) A. H.