AN IMPROVED MOUNTAIN RAILWAY SYSTEM. NEW MECHANICAL MOVEMENT. IMPROVED WOOD SCREW. RECENT INVENTIONS. MOUNTAIN RAILWAY SYSTEM—TRANSFERRING THE CAR, scientific american, 1881-01-29
AN IMPROVED MOUNTAIN RAILWAY SYSTEM. NEW MECHANICAL MOVEMENT. IMPROVED WOOD SCREW. RECENT INVENTIONS. MOUNTAIN RAILWAY SYSTEM—TRANSFERRING THE CAR, scientific american, 1881-01-29
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