The St. Gothard Tunnel

1879 Scientific American  
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 ahout
doi:10.1038/scientificamerican04191879-2736asupp fatcat:qfzmotvbibgpflz6ctfcxlmhtq