The history of the iron ore trade on the Great Lakes, from 1900 to 1980, is perhaps best related in visual form. Historians and enthusiasts alike can now learn about this important part of our country's industrial heritage in nearly 300 views of the mines, railroads, loading docks, and ships of the Great Lakes. Through the medium of the picture postcard, discover the underground and huge open-pit mines on the iron ranges in Wisconsin, Michigan, and Minnesota, and ride the rails as the iron is moved from the mines to the giant loading docks at the Upper Lake ports. In calm seas and stormy weather, travel from these ports to the international locks at Sault Ste. Marie, in Michigan and Ontario. The accurate descriptions and comprehensive deltiological information will appeal to postcard collectors, rail and nautical enthusiasts, industrial archeologists, and lovers of Great Lakes history.