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UNIVERSITY OF MISSOURI COLUMBIA DEPARTMENT OF CHEMISTRY December 9th, 1931. DEC 11 1931 Mr. H. H. Barker United States Radium Corporation 535 Pearl Street New York City My dear Barker: Anticipating the need of ionization chambers which will probably confront us when we plan to make the tests at Elgin, I wonder whether or not you would consider it advisable for me to write to Dr. Flinn for the loan of two chambers, the natural drifts of which are still very low. We have several Lind heads but our chambers, I fear, have a drift of about one small division per minute, which may be a little high for very refined work. Sincerely yours, Herman Schlundt Herman Schlundt hs.as