Mississippi River floods, report of C. McD. Townsend, president of Mississippi River Commission, to chief of engineers, with addresses delivered before Interstate Levee Association, Memphis, Tenn., Sept. 26, 1912, and before National Drainage Congress held in St. Louis, Mo., Apr. 11, 1913, also article published in Scientific American of Feb. 15, 1913, on problem of Mississippi River; presented by Mr. Ransdell.