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  2. [Clay St. Hill RR., San Francisco, Cal. Run by A.S. Hallidie's patent endless steel wire rope and gripping attachment. Overcomes an elevation of 307 feet in a length of 2800 feet. Worst grade, one foot in six]

[Clay St. Hill RR., San Francisco, Cal. Run by A.S. Hallidie's patent endless steel wire rope and gripping attachment. Overcomes an elevation of 307 feet in a length of 2800 feet. Worst grade, one foot in six]

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[Clay St. Hill RR., San Francisco, Cal. Run by A.S. Hallidie's patent endless steel wire rope and gripping attachment. Overcomes an elevation of 307 feet in a length of 2800 feet. Worst grade, one foot in six]

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http://hdl.handle.net/20.500.12352/islandora:158777