National Geographic : 1969 Mar
Fresh from the soil, pota toes ride a conveyor to trucks on Washington Island. At De troit Harbor the 200,000 bushel crop goes aboard two former ferryboats used in the Straits of Mackinac in pre bridge days. Now towed as barges, the vessels move the crop to markets in Illinois and Michigan. "North of the Tension Line," boasts Washington Is land in its quest for summer visitors, who relax in a set ting devoid of "great glamor, swank shoppes, and night life." The appeal pays divi dends: Tourism outstrips po tatoes, the island's other ma jor industry.