Waterway from Lake Superior to the Mississippi River. Letter from the Secretary of War, transmitting with a letter from the Chief of Engineers, report on preliminary examination for waterway from Lake Superior to the Mississippi River by way of Allouez Bay, at the easterly end of the Duluth-Superior Harbor, and the Amnicon, Moose, and St. Croix Rivers, Minn. and Wis.; ... April 8, 1916. -- Referred to the Committee on Rivers and Harbors and ordered to be printed, with illustrations