Triumphs and wonders of the 19th century, the true mirror of a phenomenal era, a volume of original, entertaining and instructive historic and descriptive writings, showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress .. . ost $13,000,000. The cost of the proposed suspension bridge, 3000 feetlong, over the Hudson, at New York, is estimated at $13,000,000. The firstrailway tunnel was the Portage Tunnel, in Pennsylvania, built in 1831. Thelongest railway tunnel is the Simplon, in Switzerland. It is miles inleng
Triumphs and wonders of the 19th century, the true mirror of a phenomenal era, a volume of original, entertaining and instructive historic and descriptive writings, showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress .. . ost $13,000,000. The cost of the proposed suspension bridge, 3000 feetlong, over the Hudson, at New York, is estimated at $13,000,000. The firstrailway tunnel was the Portage Tunnel, in Pennsylvania, built in 1831. Thelongest railway tunnel is the Simplon, in Switzerland. It is miles inlength, and is still under construction. The next longest is the Gothard,Switzerland. It is miles long, and was opened in 1881. In track construction, cast-iron rails began to be superseded by wrought 652 TRIUMPHS AND WONDERS OF THE XIX™ CENTURY iron in 1820, and many of the early American railways had strap iron laid ontimber stringers. Within the past twenty years steel has been used almostexclusively. In place of rails weighing 25 to 35 lbs. per yard, and 3 to 15feet in length, we now use rails of 80 to 100 lbs. per yard, 30 to 60 feet blocks and wooden ties were first used to support the rails, and thelatter are now generally used, although metal ties are extensively used and.
Size: 947px × 2639px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookidtri, booksubjectinventions
