Manual for railroad engineers and engineering students : containing the rules and tables needed for the location, construction, and equipment of railroads as built in the United States (1883)
Vose, George L. (George Leonard), 1831-1910 · Boston : Lee and Shepard · leaf 130
occur that a shaft can be driven into a heading horizon-tally, from a hill-side, at less expense than vertically, from above.Some of the small side-hill tunnels upon the French approach toMont Cenis had such shafts. The cars upon American roadsare now made so wide, and require so much space between… … Fig. 38. sylvania Railroad, shows how little room there is to spare whentwo trains occupy the tracks : the width in this case is 23 feet atthe widest part, the gauge 4 feet 9 inches, and the width betweentracks 6 feet. The Alleghany, or Gallitzin Tunnel, upon thesame road, has a width of 24 feet.…
Railroad engineering
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