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Decembor 6th,1929. Dr. S. M. Seidlin, 103 E 78th St., New York City. Dear Dr. Seidlin: This will acknowledge receipt of the reprint by Dr. Flinn and yourself entitled *Parathorzone in the Treatment of Radium Poisoning". I have read this article with interest and wish to thank you for sending me a copy. With king regards, I am Sincerely yours, Vice President. HHBarker' FR