Air mail. Investigation of air mail and ocean mail contracts, communication from William P. MacCracken, jr., in response to citation to appear before bar of Senate on 9th day of Feb. 1934, on account of alleged destruction and removal of certain papers in connection with investigation of air mail and ocean mail contracts, with responses of L. H. Brittin, Harris M. Hanshue, and Gilbert L. Givvin, respectively, to citation of Senate of Feb. 5, 1934.