First Lady of the land tries Army chow. While inspecting the United States Army Medical exhibit in Washington today, Mrs. Calvin Coolidge, sampled a piece of meat prepared by one of the soldier cooks. The exhibit was staged for the delegates to the annual convention of the American Medical Association being held in the National Capital. On the left in the photograph is Capt. G.R. Sandrock and Maj. J.P. Fletcher, in charge of the exhibit