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The waved lines show water-courses, G G being the river Reuss. The full lines show the location of the railway lines, and the dotted lines the tunnel. The points A, Band o show bridges over a cascade. The bridge at B is ahoutdoi:10.1038/scientificamerican04191879-2736asupp fatcat:qfzmotvbibgpflz6ctfcxlmhtq