The Staircase Group by Charles W. Peale (1795) George Washington by Gilbert Stuart (1796) Ariadne Asleep on the Island of Naxos by John Vanderlyn (1812) 10 Winter Scene in Brooklyn by Francis Guy (c. 1820) Mid-C19. Ruins in a Landscape by Thomas Doughty (1828) The Beeches by Asher B. Durand (1845) Approaching Storm by Martin J. Heade (c. 1860) Merced River, Yosemite Valley by Albert Bierstadt (1866) The Lackawanna Valley by George Inness (1855) Jolly Flatboatmen by George C. Bingham (1846) Blue-Winged Teal by John J. Audubon A Single Death by George Catlin Washington Crossing the Delaware by Emanuel Leutze (1851) Civil War to C20. The Falling Rocket by James A. M. Whistler (1874) The Boating Party by Mary Cassatt (1893) Breezing Up (A Fair Wind) by Winslow Homer (c. 1876) 11
The Staircase Group by Charles W. Peale (1795) George Washington by Gilbert Stuart (1796) Ariadne Asleep on the Island of Naxos by John Vanderlyn (1812) 10 Winter Scene in Brooklyn by Francis Guy (c. 1820) Mid-C19. Ruins in a Landscape by Thomas Doughty (1828) The Beeches by Asher B. Durand (1845) Approaching Storm by Martin J. Heade (c. 1860) Merced River, Yosemite Valley by Albert Bierstadt (1866) The Lackawanna Valley by George Inness (1855) Jolly Flatboatmen by George C. Bingham (1846) Blue-Winged Teal by John J. Audubon A Single Death by George Catlin Washington Crossing the Delaware by Emanuel Leutze (1851) Civil War to C20. The Falling Rocket by James A. M. Whistler (1874) The Boating Party by Mary Cassatt (1893) Breezing Up (A Fair Wind) by Winslow Homer (c. 1876) 11
The world's longest concrete and masonry arch bridge is the Rockville Bridge (1902), which carries four tracks of the former Pennsylvania Railroad over the Susquehanna River (USA) on 48 arches, 70ft (21m) each, for a total length of 3820ft (1164m). It was part of a massive twenty-year improvement programme under the direction of William H Brown, chief engineer. The largest all- reinforced concrete bridge, however, is the Tunkhannock Viaduct (1915) built by the Delaware, Lackawanna & Western Railroad in north-eastern Pennsylvania (USA), composed of ten semi- circular double-arch spans of 180ft (55m) with the spandrels filled with eleven smaller arches. Like Rockville, it was a major component in another early 20th century US railroad improvement project, this time a massive realignment. Abraham Burton Cohen was the rail line's designer of the reinforced-concrete bridges. The first major reinforced-concrete bridge in the United Kingdom was the Royal Tweed Bridge
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