Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 146
ii8 RAIL WA YS. … Fig. 52.—Trestle Bridge. tween the western base of the Black Hills and the eastern base of thesnowy range of the Rocky Mountains, which latter reach an elevation offrom 10,000 to 17,000 ft. above the sea level and are perpetually coveredwith snow. Such tablelands are termed in America parks. Before…
Inventions
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