Veta Pass, Colorado 17 Sections of Snow-sheds (3 cuts) 18 Making an Embankment 21 Steam Excavator 21 Building a Culvert 22 Building a Bridge Abutment 22 Rock Drill 23 A Construction and Boarding Train 24 Bergen Tunnels, Hoboken, N. J. 25 Beginning a Tunnel 26 Old Burr Wooden Bridge 28 Kinzua Viaduct; Erie Railway 30 Kinzua Viaduct 31 View of Thomas Pope's Proposed Cantilever (1810) 34 Pope's Cantilever in Process of Erection 35 General View of the Poughkeepsie Bridge 36 Erection of a Cantilever 37 Spiking the Track 38 Track Laying 41 Temporary Railway Crossing the St. Lawrence on the Ice 44 View Down the Blue from Rocky Point, Denver, South Park and Pacific Railroad; showing successive tiers of railway 49 Denver and Rio Grande Railway Entering the Portals of the Grand River Cañon, Colorado 54 The Kentucky River Cantilever, on the Cincinnati Southern Railway 55 Truss over Ravine, and Tunnel, Oroya Railroad, Peru 56 The Nochistongo Cut, Mexican Central Railway 57 The Mount Washington Rack Railroad 58 Trestle on Portland and Ogdensburg Railway, Crawford Notch, White Mountains 58 A Series of Tunnels 59 Tunnel at the Foot of Mount St. Stephen, on the Canadian Pacific 60 Peña de Mora on the La Guayra and Carácas Railway, Venezuela 61 Perspective View of St. Gothard Spiral Tunnels, in the Alps 62 Plan of St. Gothard Spiral Tunnels 63 Profile of the Same 63 Portal of a Finished Tunnel; showing Cameron's Cone, Colorado 64 Railway Pass at Rocky Point in the Rocky Mountains 67 Bridge Pier Founded on Piles 68 Pneumatic Caisson 70