U.S. Lake SurveyRelief shown by hachures and spot heights. Depths shown by bathymetric tints, soundings, and isolines.; "Catalogue No. 9."; "Issued October 11, 1919."; Includes text, magnetic variations chart, lists of United States and Canadian canals, and dry docks list.69 x 124 CentimetersJPEGUMN_ALMA:9976559407801701engOn sale at U.S. Lake Survey Office (Detroit, Michigan)PublicGeneral chart of Lake SuperiorMapsLake SuperiorUniversity of Minnesota