ScientificAmerican1915-03-27.jpg Scientific American 1903-11-07ThumbnailsSt. Nicholas 1929-04Scientific American 1903-11-07ThumbnailsSt. Nicholas 1929-04Scientific American 1903-11-07ThumbnailsSt. Nicholas 1929-04Scientific American 1903-11-07ThumbnailsSt. Nicholas 1929-04Scientific American 1903-11-07ThumbnailsSt. Nicholas 1929-04
A fast monorail train crossing a valley.