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Columbia University MAR 6 1929 intheity of Hembork DEPARTMENT OF CHEMICAL ENGINEERING March 5, 1929. Dr. Howard H. Barker, Vice-Pres., The U. S. Radium Corporation, 535 Pearl St., New York City. Dear Dr. Barker: I have completed the ashing and preparation of samples recently submitted by Dr. Schlundt, and have forwarded to him the ash of the seventeen specimens for his further examination. To complete the record, I am en- closing herewith a tabulated list of the samples and their description; and am including a statement for the work. I took the liberty of enclosing the report and statement in duplicate to Dr. Schlundt. Mrs. Turner joins me in kindest regards to you and Mrs. Barker. Yours ver J truly, WORD Junur W. D. Turner I/H