Construction Of Central Pacific #3
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High Bridge, New York, 19th Century
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Golden Spike Ceremony, 1869
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Brooklyn Bridge Promenade, 1898
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Northern Pacific Railroad Work Party
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Construction Of Central Pacific #1
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Nyc Subway Construction, 1906
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Harlem River, New York, 19th Century #1
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George Stephenson, English Civil
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John Smeaton, English Civil Engineer
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Brooklyn Bridge, New York, 1883
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Brooklyn Bridge Construction, 1876
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First Crossing Of The Brooklyn Bridge
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Brooklyn Bridge, 1872
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Brooklyn Bridge, 1896
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Crossing Brooklyn Bridge To Manhattan
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Marc Seguin, French Engineer
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Joseph William Bazalgette, English
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Stephensons Rocket 1829
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William Hedley, Puffing Billy, 19th
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Braithwaite And Ericsson, The Novelty
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Timothy Hackworth, Royal George, 1827
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Robert Stephenson, Rocket, 1829
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Stephenson, Rocket Steam Locomotive
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Edoux Hydraulic Lift, 1888
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Mont Cenis Rail Tunnel Construction
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Harlem River, New York, 19th Century
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Constructing The Tower Of Babel
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Noria Syria
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Aqueduct Of The Emperor Valens
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Building Roman Aqueduct
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Brooklyn Bridge Entrance, New York, 1883
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Brooklyn Bridge, New York, 1883 #1
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Brooklyn Bridge, New York, 1883 #2
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Morse Suspension Bridge Plan, 1869
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Golden Gate Bridge Cable #3
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Golden Gate Bridge Cable #4
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Brooklyn Bridge, New York, 1883
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Eiffel Tower Machinery, 1890s
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Gustave Eiffel At Eiffel Tower Summit
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Nyc Subway Construction, Union Square
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Construction Of Central Pacific
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Nyc Subway Construction, 1901
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Nyc Subway Construction, 1901 #1
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London Sewerage System, 1845
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First Electric Railway, 1879
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Nyc Subway Construction, 1926
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Nyc Subway Construction, 1901 #2
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Chicago, Washington Street Tunnel, 1911
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Types Of Bridges, 1799
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Mont Cenis Rail Tunnel Construction #1
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Types Of Bridges, 1799 #1
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Golden Gate Bridge Cable
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Brunton Machine, 1874
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Britannia Bridge Across Menai Strait
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Conwy Box Girder Bridge, Wales, 1849
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Eiffel Tower, Exposition Universelle #2
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Eiffel Tower, Paris Expo, 1900
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Pont Du Gard, Ancient Roman Aqueduct #1
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Pont Du Gard, Ancient Roman Aqueduct #2
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Eiffel Tower, Exposition Universelle #1
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Britannia Bridge Across Menai Strait
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