The Great Events by Famous Historians…
“ The steepest grade on a railroad doing a miscellaneous transportation business climbed by a locomotive relying on adhesion only is on the Leopoldina system in Brazil between Bocca do Monte and Theodoso, where there is a stretch of 8-1/3 per cent. grade with curves of 130 feet radius. There are some logging roads in the United States with grades of 16 per cent. How trifling this seems when compared with the feat of a Thomas car which climbed Fillmore Street, San Francisco, which is alleged to have a gradient of 34 per cent., with twenty-three persons on board. As 25 per cent. ”
