Steam Locomotive Diagram
Bessemer Process
Union Pacific "Big Boy" Steam Locomotive
Men Cutting and Laying Steel Rail, Railroad Museum of Pennsylvania Photo
World's First All-Steel Railroad Bridge, 1879
Edgar Thomson's Steel Works, 1909. Pennell, Joseph, 1857-1926, artist
Great bridge over the Monongahela - train of molten iron approaching, steel works, Homestead, Pa., U.S.A. 1907
Bessemer Process