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| | Pilatusbahn, the world's steepest cog railway |
 | | This results in a gradient of 48%, or a rise of nearly one meter in two meters of run on the steepest sections of the line, which amounts to about a quarter of its length. |
 | | The world's first cog railway on Mount Washington (New Hampshire, U.S.A.) was built in 1869 by Sylvester Marsh (with a maximum slope of 37.41 percent, it is also the second steepest gradient in the world). |
 | | The world's highest cog railway is the Manitou & Pike's Peak Railway (Colorado, U.S.A.), built by SLM for Wilhelm Hildenbrand in 1891 using Roman Abt's system (two parallel, but offset, steel racks with open, upstanding teeth that mesh with the locomotive cogwheels), climbing grades of 25 percent. |
| www.asme.org /history/roster/H220.html (591 words) |
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