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April 3rd,1929. Dr. Herman Schlundt, University of Missouri, Columbia, No. Dear Dr. Schlundt Under separate cover we are sending you today, 20 one microgramend 10 two microgram ampoules, to be used inthe standardization of the Wulf-Hess electromet- er. I am sending to Dr. Flinn duplicates of what I am sending to you. With kind regards, I am Very truly yours, Vice President. HHBarker*R]