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PURDUE UNIVERSITY LAFAYETTE, INDIANA RECEIVED SCHOOL OF SCIENCE OFFICE OF THE DEAN MAY 14 1978 is May llth, 1 9 2 8. by - yi MATEDL Mr. H. H. Barker, U. S. Radium Corporation, 535 Pearl Street, New York, N. Y. My dear Mr. Barker: I am enclosing a bill for my recent services in New York. As I went East for one other purpose in addition to your work I am charging you railroad fare from Lafayette to New York one way only and am not charging any time whilst traveling between New York and Lafayette. Sincerely yours, RBM* JR pm one R. B. Moore Dean of Science