Document dnJQO0QK73NgnG2w0kjoeBqY5

April 10, 1952 lb*. K. A. Mshurin, Chief Laboratory Section Meet Inspection Division Bureau of Animal Industry D.S. Dept, of Agriculture Washington, D.C. Dear Ur. lSshurin: I appreciate your prompt replies contained in your three letters of April U, 1952 pertaining to Qeon Basin 503, 500I7U9, and 575X6. I note, however, one minor orror in the letter relative to 500X71i9 The Sentoaerse X saterial should be S. Very truly yours. W. S. McCormick Department of Industrial Hygiene and Toad oology TflBl vo BFG03653 20494001